@article{AFM_1967_391-410_a8,
     author = {Olli Martio},
     title = {Boundary values and injectiveness of the solutions of {Beltrami} equations},
     journal = {Annales Fennici Mathematici},
     year = {1967},
     volume = {391-410},
     doi = {10.5186/aasfm.1967.402},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1967.402/}
}