%0 Journal Article %A A. V. Dmitriev %A E. V. Vladimirova %A M. A. Semkin %A A. V. Korolev %T Spin-glass transition in porous spheres BiFeO$_3$ %J Nanosistemy: fizika, himiâ, matematika %D 2020 %P 565-571 %V 11 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2020_11_5_a8/ %G en %F NANO_2020_11_5_a8