@article{FAA_1989_23_3_a22,
     author = {R. B. Stekol'shchik},
     title = {Perfect elements in the modular structure associated with the extended {Dynkin} diagram $\widetilde{e}_6$},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {90--92},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1989_23_3_a22/}
}