@article{TMF_2013_176_2_a1,
     author = {A. Ya. Silenko},
     title = {Comparative analysis of direct and {\textquotedblleft}step-by-step" {Foldy{\textendash}Wouthuysen} transformation methods},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {189--204},
     year = {2013},
     volume = {176},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2013_176_2_a1/}
}