- [old OFF implementation](https://github.com/szaghi/OFF/blob/testing/src/Lib_Morton.f90) - [morton_fortran](https://github.com/jannisteunissen/morton_fortran) - [libmorton](https://github.com/Forceflow/libmorton) - [wikipedia](https://en.m.wikipedia.org/wiki/Z-order_curve) - [Morton bit interleaving](http://www.forceflow.be/2013/10/07/morton-encodingdecoding-through-bit-interleaving-implementations/) - [algorithms comparison](http://www.forceflow.be/2016/01/18/libmorton-a-library-for-morton-order-encoding-decoding/)
