%0 Journal Article %A Lars C. Mejlbo %T On the Solution of the Commutation Relation PQ - QP = -iI. %J Mathematica Scandinavica %D 1963 %P 129-139 %V 13 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1963__13_165857/ %F MS2_1963__13_165857