TY - JOUR AU - Richard L. Rubin TI - Linear operators satisfying the chain rule. JO - Elemente der Mathematik PY - 1983 SP - 93 EP - 95 VL - 38 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ELMA_1983__38_141316/ ID - ELMA_1983__38_141316 ER -