Petukhov, A., A. Bogolyubov, and M. Trubetskov. “Hybrid Methods for Modeling Waveguides Containing Local Inhomogeneous Insets of Multilayer Structure”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 17, no. 49, July 2016, pp. 268-79, doi:10.26089/NumMet.v17r325.