@article{MZM_1991_50_6_a1,
     author = {O. A. Asadchii},
     title = {Maximum principle for spatial quasiconformal mappings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {14--23},
     year = {1991},
     volume = {50},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_6_a1/}
}