// <I>AMEE 2019<D> : Proceedings of the 45rd International conference "Applications of mathematics in engineering and economics 2019", Sozopol, 7-13 june 2019, Ser. AIP conf. proc., 2172, 2019, Art. № 070010, DOI: 10.1063/1.5133546.
// <I>CMMSE 2017<D> : Proceedings of the 17th International conference on "Computational and mathematical methods in science and engineering CMMSE' 17, Costa Ballena, Rota, Cadiz, Spain, 4-8 july 2017, p. 1181-1184.