%0 Journal Article %A Jacob Katriel %A H. E. Montgomery %A Jr. %A A. Sarsa %A E. Buendía %A F. J. Gálvez %A K. D. Sen %T Hund's rule in open-shell states of two-electron systems: from free through confined and screened atoms, to quantum dots %J Nanosistemy: fizika, himiâ, matematika %D 2019 %P 31-41 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2019_10_1_a3/ %G en %F NANO_2019_10_1_a3