@article{TMF_1974_19_1_a3,
     author = {S. S. Ivanov and D. Ya. Petrina and A. L. Rebenko},
     title = {On equations for the coefficient functions of the $S$-matrix in quantum field theory},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {37--46},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_19_1_a3/}
}