%0 Journal Article %A Duff, G.F.D. %T On the Principle of Superposition in Quantum Mechanics %J Canadian mathematical bulletin %D 1964 %P 77-83 %V 7 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1964-010-5/ %R 10.4153/CMB-1964-010-5 %F 10_4153_CMB_1964_010_5