@article{MAT_1966_10_6_a3,
     author = {F. W. Gehring and J. V\"ais\"al\"a},
     title = {The coefficients of quasiconformality of domains in space},
     journal = {Matematika},
     pages = {60--120},
     publisher = {mathdoc},
     volume = {10},
     number = {6},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1966_10_6_a3/}
}