@article{TMF_1975_25_2_a9,
     author = {L. A. Khalfin},
     title = {Induced singularities in the mass distribution of unstable particles associated with cascade decay and the problem of $CP$ invariance},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {260--264},
     year = {1975},
     volume = {25},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_25_2_a9/}
}