@article{TMF_1973_17_3_a3,
     author = {Kh. D. Popov and D. Ts. Stoyanov},
     title = {General vertex in a model with finite set of oscillators},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {332--341},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1973_17_3_a3/}
}