add citation information (#29)

Author: lucaferranti

CITATION.bib

@@ -0,0 +1,8 @@
+@misc{ferranti2023fuzzylogicjl,
+      title={FuzzyLogic.jl: a Flexible Library for Efficient and Productive Fuzzy Inference}, 
+      author={Luca Ferranti and Jani Boutellier},
+      year={2023},
+      eprint={2306.10316},
+      archivePrefix={arXiv},
+      primaryClass={cs.AI}
+}

CITATION.cff

@@ -0,0 +1,27 @@
+# This CITATION.cff file was generated with cffinit.
+# Visit https://bit.ly/cffinit to generate yours today!
+
+cff-version: 1.2.0
+title: FuzzyLogic.jl
+message: "If you use this software, please cite it as below."
+type: software
+authors:
+  - given-names: Luca
+    family-names: Ferranti
+identifiers:
+  - type: doi
+    value: 10.5281/zenodo.7570243
+repository-code: 'https://github.com/lucaferranti/FuzzyLogic.jl'
+license: MIT
+preferred-citation:
+  type: article
+  authors:
+  - family-names: "Ferranti"
+    given-names: "Luca"
+    orcid: "https://orcid.org/0000-0001-5588-0920"
+  - family-names: "Boutellier"
+    given-names: "Jani"
+    orcid: "https://orcid.org/0000-0001-7606-3655"
+  journal: "arxiv:2306.10316"
+  title: "FuzzyLogic.jl: a Flexible Library for Efficient and Productive Fuzzy Inference"
+  year: 2023

README.md

@@ -1,10 +1,10 @@
 # FuzzyLogic.jl
 
-|**Info**|**Build status**|**Documentation**|**Contributing**|
-|:------:|:--------------:|:---------------:|:--------------:|
-|[![version][ver-img]][ver-url]|[![CI Status][ci-img]][ci-url]|[![Stable docs][stable-img]][stable-url]|[![contributing guidelines][contrib-img]][contrib-url]|
-|[![Licese: MIT][license-img]][license-url]|[![Coverage][cov-img]][cov-url]|[![Dev docs][dev-img]][dev-url]|[![SciML Code Style][style-img]][style-url]|
-|[![downloads][download-img]][download-url]|[![pkgeval-img]][pkgeval-url]||[![gitter-chat][chat-img]][chat-url]|
+|**Info**|**Build status**|**Documentation**|**Contributing**|**Citation**|
+|:------:|:--------------:|:---------------:|:--------------:|:----------:|
+|[![version][ver-img]][ver-url]|[![CI Status][ci-img]][ci-url]|[![Stable docs][stable-img]][stable-url]|[![contributing guidelines][contrib-img]][contrib-url]|[![bibtex][bibtex-img]][bibtex-url]
+|[![Licese: MIT][license-img]][license-url]|[![Coverage][cov-img]][cov-url]|[![Dev docs][dev-img]][dev-url]|[![SciML Code Style][style-img]][style-url]|[![paper][paper-img]][paper-url]|
+|[![downloads][download-img]][download-url]|[![pkgeval-img]][pkgeval-url]||[![gitter-chat][chat-img]][chat-url]|[![zenodo][zenodo-img]][zenodo-url]
 
 <p align="center">
 <img src="./docs/src/assets/logo.svg"/>
@@ -119,3 +119,12 @@ Contributions are welcome! Here is a small decision tree with useful links.
 
 [chat-img]: https://badges.gitter.im/badge.svg
 [chat-url]: https://app.gitter.im/#/room/#FuzzyLogic-jl:gitter.im
+
+[bibtex-img]: https://img.shields.io/badge/BibTeX-citation-orange
+[bibtex-url]: https://github.com/lucaferranti/FuzzyLogic.jl/blob/main/CITATION.bib
+
+[paper-img]: https://img.shields.io/badge/arxiv-paper-blue
+[paper-url]: https://arxiv.org/abs/2306.10316
+
+[zenodo-img]: https://img.shields.io/badge/Zenodo-archive-blue
+[zenodo-url]: https://doi.org/10.5281/zenodo.7570243

docs/src/index.md

@@ -1,10 +1,10 @@
 # FuzzyLogic.jl
 
-|**Info**|**Build status**|**Documentation**|**Contributing**|
-|:------:|:--------------:|:---------------:|:--------------:|
-|[![version](https://juliahub.com/docs/FuzzyLogic/version.svg)](https://github.com/lucaferranti/FuzzyLogic.jl/releases/latest)|[![CI Status](https://github.com/lucaferranti/FuzzyLogic.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/lucaferranti/FuzzyLogic.jl/actions/workflows/CI.yml?query=branch%3Amain)|[![Stable docs](https://img.shields.io/badge/docs-stable-blue.svg)](https://lucaferranti.github.io/FuzzyLogic.jl/stable/)|[![contributing guidelines](https://img.shields.io/badge/Contributor-Guide-blueviolet)](https://lucaferranti.github.io/FuzzyLogic.jl/dev/contributing)|
-|[![Licese: MIT](https://img.shields.io/badge/license-MIT-yellow.svg)](https://github.com/lucaferranti/FuzzyLogic.jl/blob/main/LICENSE)|[![Coverage](https://codecov.io/gh/lucaferranti/FuzzyLogic.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/lucaferranti/FuzzyLogic.jl)|[![Dev docs](https://img.shields.io/badge/docs-dev-blue.svg)](https://lucaferranti.github.io/FuzzyLogic.jl/dev/)|[![SciML Code Style](https://img.shields.io/static/v1?label=code%20style&message=SciML&color=9558b2&labelColor=389826)](https://github.com/SciML/SciMLStyle)|
-|[![downloads](https://shields.io/endpoint?url=https://pkgs.genieframework.com/api/v1/badge/FuzzyLogic&label=downloads)](https://pkgs.genieframework.com/?packages=FuzzyLogic)|[![PkgEval](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/F/FuzzyLogic.svg)](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/F/FuzzyLogic.html)||[![gitter-chat](https://badges.gitter.im/badge.svg)](https://app.gitter.im/#/room/#FuzzyLogic-jl:gitter.im)|
+|**Info**|**Build status**|**Documentation**|**Contributing**|**Citation**|
+|:------:|:--------------:|:---------------:|:--------------:|:----------:|
+|[![version](https://juliahub.com/docs/FuzzyLogic/version.svg)](https://github.com/lucaferranti/FuzzyLogic.jl/releases/latest)|[![CI Status](https://github.com/lucaferranti/FuzzyLogic.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/lucaferranti/FuzzyLogic.jl/actions/workflows/CI.yml?query=branch%3Amain)|[![Stable docs](https://img.shields.io/badge/docs-stable-blue.svg)](https://lucaferranti.github.io/FuzzyLogic.jl/stable/)|[![contributing guidelines](https://img.shields.io/badge/Contributor-Guide-blueviolet)](https://lucaferranti.github.io/FuzzyLogic.jl/dev/contributing)|[![bibtex](https://img.shields.io/badge/BibTeX-citation-orange)](https://github.com/lucaferranti/FuzzyLogic.jl/blob/main/CITATION.bib)
+|[![Licese: MIT](https://img.shields.io/badge/license-MIT-yellow.svg)](https://github.com/lucaferranti/FuzzyLogic.jl/blob/main/LICENSE)|[![Coverage](https://codecov.io/gh/lucaferranti/FuzzyLogic.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/lucaferranti/FuzzyLogic.jl)|[![Dev docs](https://img.shields.io/badge/docs-dev-blue.svg)](https://lucaferranti.github.io/FuzzyLogic.jl/dev/)|[![SciML Code Style](https://img.shields.io/static/v1?label=code%20style&message=SciML&color=9558b2&labelColor=389826)](https://github.com/SciML/SciMLStyle)|[![paper](https://img.shields.io/badge/arxiv-paper-blue)](https://arxiv.org/abs/2306.10316)
+|[![downloads](https://shields.io/endpoint?url=https://pkgs.genieframework.com/api/v1/badge/FuzzyLogic&label=downloads)](https://pkgs.genieframework.com/?packages=FuzzyLogic)|[![PkgEval](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/F/FuzzyLogic.svg)](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/F/FuzzyLogic.html)||[![gitter-chat](https://badges.gitter.im/badge.svg)](https://app.gitter.im/#/room/#FuzzyLogic-jl:gitter.im)|[![zenodo](https://img.shields.io/badge/Zenodo-archive-blue)](https://doi.org/10.5281/zenodo.7570243)
 
 A Julia library for fuzzy logic and applications.