ANGERMANN, L.; YATSYK, V. V.; YATSYK, M. V. The Type-Conversion of Oscillations at the Excitation of Nonlinear Layered Media. Bulletin of V.N. Karazin Kharkiv National University, series «Mathematical modeling. Information technology. Automated control systems», v. 27, p. 13-21, 26 Oct. 2015.