TY - JOUR AU - Pták, Vlastimil AU - Vrbová, Pavla TI - On the spectral function of a normal operator JO - Czechoslovak Mathematical Journal PY - 1973 SP - 615 EP - 616 VL - 23 IS - 4 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1973.101203/ DO - 10.21136/CMJ.1973.101203 LA - en ID - 10_21136_CMJ_1973_101203 ER -