Myasnikov, E.N., and Z.P. Mastropas. “Microprocesses at Second-Order Phase Transitions in Crystals With Strong Interband Electron-Phonon Interaction”. Ukrainian Journal of Physics 56, no. 10 (February 6, 2022): 1030. Accessed November 22, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2022004.