For citations:

Barkovskii N.V. Methods for identification of Bi (v) and unusual oxygen valence states in BaBiO3 and superconducting oxides of K - Ba - Bi - O system. Industrial laboratory. Diagnostics of materials. 2019;85(8):16-28. (In Russ.) https://doi.org/10.26896/1028-6861-2019-85-8-16-28