@article{MOMA_1991__111_1_178522,
     author = {Jussi V\"ais\"al\"a},
     title = {Bounded {Turning} and {Quasiconformal} {Maps.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {233--244},
     publisher = {mathdoc},
     volume = {111},
     number = {1},
     year = {1991},
     zbl = {0736.30016},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1991__111_1_178522/}
}