@article{AFM_1996_21_2_a3,
     author = {Puqi Tang},
     title = {Regularity and extremality of quasiconformal homeomorphisms on {CR} 3-manifolds},
     journal = {Annales Fennici Mathematici},
     pages = {289--308},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_1996_21_2_a3/}
}