TY - JOUR AU - Hamid Boua TI - Cosine families of operators have the SVEP JO - Filomat PY - 2023 SP - 387 VL - 37 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.2298/FIL2302387B/ DO - 10.2298/FIL2302387B LA - en ID - 10_2298_FIL2302387B ER -