TY - JOUR AU - R. B. Stekol'shchik TI - Invariant elements in a modular lattice associated with an extended dynkin diagram $\widetilde{E}_6$ JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1992 SP - 42 EP - 53 VL - 26 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1992_26_1_a5/ LA - ru ID - FAA_1992_26_1_a5 ER -