APA

Valkov A. V., Sergievskiy V. V., Sofronov V. L., Kalaev M. E. & Ermakova Y. V.Studies in the Field of Rare Earth Elements. : .

Chicago

Valkov A V, Sergievskiy V V, Sofronov V L, Kalaev M E and Ermakova Ya V.Studies in the Field of Rare Earth Elements. : .

Harvard

Valkov A. V., Sergievskiy V. V., Sofronov V. L., Kalaev M. E. and Ermakova Y. V.Studies in the Field of Rare Earth Elements. : .

MLA

Valkov A V, Sergievskiy V V, Sofronov V L, Kalaev M E and Ermakova Ya V.: . .