Vasylechko, L., Niewa, R., Borrmann, H., Knapp, M., Savytskii, D., Matkovski, A., et al. (2001). R-3c-Pbnm phase transition of La1-xSmxGaO3 (0 < x < 0.3) perovskites and crystal structures of the orthorhombic and trigonal phases. Solid State Ionics, 143, 219-227. doi:10.1016/S0167-2738(01)00857-8.