@article{DAN_1992_324_3_a0,
     author = {V. I. Burenkov and V. A. Gusakov},
     title = {On exact constants in {Sobolev} embedding theorems. {II}},
     journal = {Doklady Akademii Nauk},
     pages = {505--510},
     publisher = {mathdoc},
     volume = {324},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_324_3_a0/}
}