@article{00936950,
title = {Regularity and extremality of quasiconformal homeomorphisms on CR 3-manifolds.},
journal = {Annales Academiae Scientiarum Fennicae. Mathematica},
volume = {21},
year = {1996},
pages = {289-308},
zbl = {0880.32010},
language = {en},
url = {http://dml.mathdoc.fr/item/00936950}
}
Tang, Puqi. Regularity and extremality of quasiconformal homeomorphisms on CR 3-manifolds.. Annales Academiae Scientiarum Fennicae. Mathematica, Tome 21 (1996) pp. 289-308. http://gdmltest.u-ga.fr/item/00936950/