@article{DAN_1958_119_5_a7,
     author = {M. A. Naimark},
     title = {On the expansion of the tensor product of the proper {Lorenz} group principal series representations},
     journal = {Doklady Akademii Nauk},
     pages = {872--875},
     year = {1958},
     volume = {119},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_119_5_a7/}
}