@article{FAA_1989_23_2_a18,
     author = {D. B. Fuchs},
     title = {Two projections of singular vectors of {Verma} modules over the affine {Lie} albegra $A_1^1$},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {81--83},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1989_23_2_a18/}
}