1. |
A. M. Bychkov, A. A. Borisov, D. A. Khramov, A. V. Guzhova, V. S. Urusov, “Change of ihe valent and structural state of iron ions upon melting of barium ferrookermanite
$\mathrm{Ba}_2\mathrm{FeSi}_2\mathrm{O}_7$”, Dokl. Akad. Nauk, 322:3 (1992), 525–530 |