Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1967__20_165982, author = {B. Fuglede}, title = {On the {Relation} {PQ} {-QP} = {-iI.}}, journal = {Mathematica Scandinavica}, pages = {79--88}, publisher = {mathdoc}, volume = {20}, year = {1967}, zbl = {0149.10101}, url = {http://geodesic.mathdoc.fr/item/MS2_1967__20_165982/} }
B. Fuglede. On the Relation PQ -QP = -iI.. Mathematica Scandinavica, Tome 20 (1967), pp. 79-88. http://geodesic.mathdoc.fr/item/MS2_1967__20_165982/