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@article{MZM_1979_25_3_a0, author = {A. I. Gusev}, title = {Best approximation in normed modules over semifields}, journal = {Matemati\v{c}eskie zametki}, pages = {321--328}, publisher = {mathdoc}, volume = {25}, number = {3}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1979_25_3_a0/} }
A. I. Gusev. Best approximation in normed modules over semifields. Matematičeskie zametki, Tome 25 (1979) no. 3, pp. 321-328. http://geodesic.mathdoc.fr/item/MZM_1979_25_3_a0/