@article{AIHPA_1973__19_2_171_0,
     author = {Mickelsson, J. and Niederle, J.},
     title = {On integrability of discrete representations of {Lie} algebra $u(p, q)$},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {171--177},
     publisher = {Gauthier-Villars},
     volume = {19},
     number = {2},
     year = {1973},
     mrnumber = {422514},
     zbl = {0285.22015},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1973__19_2_171_0/}
}