@article{FAA_2002_36_3_a2,
     author = {S. A. Kruglyak and V. I. Rabanovich and Yu. S. Samoilenko},
     title = {On {Sums} of {Projections}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {20--35},
     publisher = {mathdoc},
     volume = {36},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2002_36_3_a2/}
}