@article{VNGU_2012_12_3_a8,
     author = {S. P. Kovalyov},
     title = {Diagrammatic {Description} of {Software} {Systems} {Composition}},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {103--126},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2012_12_3_a8/}
}