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@article{MZM_1987_41_2_a14, author = {J. G. Horv\'ath and M. I. Shtogrin}, title = {Two extremal problems for {Dirichlet--Voronoi} domains}, journal = {Matemati\v{c}eskie zametki}, pages = {257--264}, publisher = {mathdoc}, volume = {41}, number = {2}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_41_2_a14/} }
J. G. Horváth; M. I. Shtogrin. Two extremal problems for Dirichlet--Voronoi domains. Matematičeskie zametki, Tome 41 (1987) no. 2, pp. 257-264. http://geodesic.mathdoc.fr/item/MZM_1987_41_2_a14/