@article{FAA_1973_7_4_a17,
     author = {V. S. Pilidi},
     title = {Index computation for a bisingular operator},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {93--94},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1973_7_4_a17/}
}