%0 Journal Article %A F. L. Bezrukov %T Using singular classical solutions for calculating multiparticle cross sections in field theory %J Teoretičeskaâ i matematičeskaâ fizika %D 1998 %P 358-372 %V 115 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1998_115_3_a2/ %G ru %F TMF_1998_115_3_a2