@article{MZM_2004_75_1_a13,
     author = {P. G. Grigor'ev},
     title = {On the {Orthomassivity} of the {Set} of {Characteristic} {Functions} of {Convex} {Sets}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {151--155},
     publisher = {mathdoc},
     volume = {75},
     number = {1},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_75_1_a13/}
}