Melnyk, S.; Melnyk, S.; Lavrinovich, A.; Cherpak, N. Catastrophe Theory in the Phenomenological Description of the Avalanche Effect in Dc-Biased Microwave HTSC Transmission Lines: Superconductors at Microwave Frequencies and Flux Flow Instabilities. Fiz. Nizk. Temp. 2020, 46, 433-440.