@article{AIHPA_1975__23_4_313_0,
     author = {Havl{\'\i}\v{c}ek, M. and Exner, P.},
     title = {On the minimal canonical realizations of the {Lie} algebra $O_c(n)$},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {313--333},
     publisher = {Gauthier-Villars},
     volume = {23},
     number = {4},
     year = {1975},
     mrnumber = {400944},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1975__23_4_313_0/}
}