@article{AA_2009_21_5_a2,
     author = {V. V. Volchkov and Vit. V. Volchkov},
     title = {Extremal problems related to the {John} uniqueness theorem},
     journal = {Algebra i analiz},
     pages = {37--69},
     publisher = {mathdoc},
     volume = {21},
     number = {5},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2009_21_5_a2/}
}