TY - JOUR AU - Putnam, C. R. TI - On Square Roots and Logarithms of Self-Adjoint Operators JO - Glasgow mathematical journal PY - 1958 SP - 1 EP - 2 VL - 4 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S204061850003375X/ DO - 10.1017/S204061850003375X ID - 10_1017_S204061850003375X ER -