@article{BUMI_1999_8_2B_3_a6,
     author = {Cianchi, Andrea},
     title = {Optimal integrability of the {Jacobian} of orientation preserving maps},
     journal = {Bollettino della Unione matematica italiana},
     pages = {619--628},
     publisher = {mathdoc},
     volume = {Ser. 8, 2B},
     number = {3},
     year = {1999},
     zbl = {0937.46037},
     mrnumber = {989570},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1999_8_2B_3_a6/}
}