@article{AFM_2007_32_2_a15,
     author = {Bogdan Bojarski},
     title = {Primary solutions of general {Beltrami} equations},
     journal = {Annales Fennici Mathematici},
     pages = {549--557},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2007_32_2_a15/}
}