@article{DAN_1962_145_6_a14,
     author = {O. S. Parasyuk},
     title = {Hadamard's multiplication theorem and the analytical continuation of the two-particle unitarity condition},
     journal = {Doklady Akademii Nauk},
     pages = {1247--1248},
     publisher = {mathdoc},
     volume = {145},
     number = {6},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_145_6_a14/}
}