@article{TMF_1977_30_3_a13,
     author = {Ya. I. Granovskii},
     title = {Generating scattering amplitude},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {420--425},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1977_30_3_a13/}
}