TY - JOUR AU - E. V. Damaskinsky TI - $O$-invariant $U$-cyclic Weyl systems JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1973 SP - 70 EP - 77 VL - 15 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1973_15_1_a4/ LA - ru ID - TMF_1973_15_1_a4 ER -