Djotyan, G.P. et al. 2000. Nonlinear optics of the thin-film quasiwaveguide amplifier: applications to directional switching in the optical communication systems. Journal of Telecommunications and Information Technology. 1, 1-2 (Jun. 2000), 20–23. DOI:https://doi.org/10.26636/jtit.2000.1-2.18.