@article{SJVM_2020_23_3_a5,
     author = {I. V. Kireev},
     title = {Orthogonal projectors and systems of linear algebraic equations},
     journal = {Sibirskij \v{z}urnal vy\v{c}islitelʹnoj matematiki},
     pages = {315--324},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJVM_2020_23_3_a5/}
}