TY - JOUR AU - A. Ya. Helemskii TI - On the representation of differentiations by Hamiltonians, operating from an algebra of local observable spin systems JO - Matematičeskie zametki PY - 1977 SP - 93 EP - 98 VL - 21 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1977_21_1_a10/ LA - ru ID - MZM_1977_21_1_a10 ER -