BAKAI, O. S. et al. To the 80th birthday of Serhiy Mykhailovych Ryabchenko. Ukrainian Journal of Physics, [S. l.], v. 65, n. 10, p. 831, 2020. Disponível em: https://ujp.bitp.kiev.ua/index.php/gyt/article/view/2020281. Acesso em: 7 dec. 2025.