%0 Journal Article %A S. Leble %T Heisenberg chain equations in terms of Fockian covariance with electric field account and multiferroics in nanoscale %J Nanosistemy: fizika, himiâ, matematika %D 2019 %P 18-30 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2019_10_1_a2/ %G en %F NANO_2019_10_1_a2