@article{AFM_2010_35_1_a3,
     author = {Bogdan Bojarski},
     title = {On the {Beltrami} equation, once again: 54 years later},
     journal = {Annales Fennici Mathematici},
     pages = {59--73},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {2010},
     doi = {10.5186/aasfm.2010.3504},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2010.3504/}
}