@article{DAN_1987_294_6_a4,
     author = {A. V. Tyrin},
     title = {Regularity of harmonic mappings as a consequence of an instability},
     journal = {Doklady Akademii Nauk},
     pages = {1306--1309},
     publisher = {mathdoc},
     volume = {294},
     number = {6},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_294_6_a4/}
}