@article{TMF_1988_75_1_a4,
     author = {N. M. Petrov},
     title = {Off-shell description of two-particle interactions by the boundary condition method},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {53--60},
     year = {1988},
     volume = {75},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1988_75_1_a4/}
}