@article{10_4064_ap_32_1_59_70,
     author = {Kenneth P. Goldberg},
     title = {On a class of extremal quasi-conformal mappings},
     journal = {Annales Polonici Mathematici},
     pages = {59--70},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1976},
     doi = {10.4064/ap-32-1-59-70},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-32-1-59-70/}
}