@article{AFM_1995_20_1_a8,
     author = {Juha Heinonen and Shanshuang Yang},
     title = {Strongly uniform domains and periodic quasiconformal maps},
     journal = {Annales Fennici Mathematici},
     pages = {123--148},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_1995_20_1_a8/}
}