@article{CM_1956-1958__13__263_0,
     author = {Dixmier, J.},
     title = {Sur la relation $i(PQ-QP) = 1$},
     journal = {Compositio Mathematica},
     pages = {263--269},
     publisher = {Kraus Reprint},
     volume = {13},
     year = {1956-1958},
     mrnumber = {101478},
     zbl = {0083.34703},
     language = {fr},
     url = {http://www.numdam.org/item/CM_1956-1958__13__263_0/}
}