Update default.html

Author: sichkar-valentyn

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@@ -50,6 +50,9 @@ <h3 id="reference-to">Reference to:</h3>
 
 <h3 id="related-works">Related works:</h3>
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+    <p>Sichkar V.N. Comparison analysis of knowledge based systems for navigation of mobile robot and collision avoidance with obstacles in unknown environment. St. Petersburg State Polytechnical University Journal. Computer Science. Telecommunications and Control Systems, 2018, Vol. 11, No. 2, Pp. 64–73. DOI: <a href="https://doi.org/10.18721/JCSTCS.11206" target="_blank">10.18721/JCSTCS.11206</a></p>
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     <p>The investigation of Reinforcement Learning for the tasks of shortest path planning is put in separate repository and is available here: <a href="https://github.com/sichkar-valentyn/Reinforcement_Learning_in_Python">Reinforcement Learning in Python</a></p>
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