@article{DAN_1996_347_5_a4,
     author = {B. P. Kufarev},
     title = {On the length and area principle for planar mappings with bounded},
     journal = {Doklady Akademii Nauk},
     pages = {597--600},
     year = {1996},
     volume = {347},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_347_5_a4/}
}