Structural and magnetic phases of Bi1-xAxFeO3-δ (A = Sr, Pb) perovskitesI. O. Troyanchuk, M. V. Bushinsky, D. V. Karpinsky, V. Sirenko, V. Sikolenko and V. EfimovEur. Phys. J. B, 73 3 (2010) 375-381DOI: https://doi.org/10.1140/epjb/e2010-00004-y