Yu. V. Kabirov, V. G. Gavrilyachenko, A. S. Bogatin, E. I. Sitalo, V. K. Yatzenko, “Effect of a magnetic field on the permittivity of 80%La$_{0.7}$Sr$_{0.3}$MnO$_{3}$/20%GeO$_{2}$ composite”, Fizika Tverdogo Tela, 60:1 (2018), 61–64; Phys. Solid State, 60:1 (2018), 60–63
