TY - JOUR AU - Duff, G.F.D. TI - On the Principle of Superposition in Quantum Mechanics JO - Canadian mathematical bulletin PY - 1964 SP - 77 EP - 83 VL - 7 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1964-010-5/ DO - 10.4153/CMB-1964-010-5 ID - 10_4153_CMB_1964_010_5 ER -