%0 Journal Article %A A. Ya. Silenko %T Comparative analysis of direct and “step-by-step" Foldy–Wouthuysen transformation methods %J Teoretičeskaâ i matematičeskaâ fizika %D 2013 %P 189-204 %V 176 %N 2 %U http://geodesic.mathdoc.fr/item/TMF_2013_176_2_a1/ %G ru %F TMF_2013_176_2_a1