(1)
A.S. Moskvin, Charge states of strongly correlated 3d oxides: from typical insulator to unconventional electron-hole Bose liquid: Новые электронные материалы и системы, Low Temp. Phys. 33, (2007) [Fiz. Nizk. Temp. 33, 314-327, (2007)] DOI: https://doi.org/10.1063/1.2719961.