@article{TMF_1971_8_2_a0,
     author = {B. V. Medvedev and V. P. Pavlov and A. D. Sukhanov},
     title = {Lagrangian and $S$ matrix},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {153--160},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_8_2_a0/}
}