%0 Journal Article %A W. I. Fushchych %A V. M. Shtelen' %T Reductions and exact solutions of a~nonlinear Dirac equation %J Teoretičeskaâ i matematičeskaâ fizika %D 1987 %P 35-44 %V 72 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1987_72_1_a3/ %G ru %F TMF_1987_72_1_a3