Spectral Analysis and Information Entropy Approaches to Data of VLF Disturbances in the Waveguide Earth-Ionosphere. - Yuriy Rapoport; Volodymyr Reshetnyk; Asen Grytsai; Volodymyr Grimalsky; Oleksandr Liashchuk; Alla Fedorenko; Masashi Hayakawa; Andrzej Krankowski; Leszek P. Blaszkiewicz; Pawel Flisek (Sensors, 2022)