TY - JOUR AU - M. L. Chumak TI - Multiplicity of the spectrum of representations connected with integrable $G$-invariant Hamiltonian systems JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1989 SP - 90 EP - 91 VL - 23 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1989_23_1_a21/ LA - ru ID - FAA_1989_23_1_a21 ER -