@article{EXMATH_1987_1987_1_a13,
     author = {Fern\'andez, Jos\'e L.},
     title = {Problemas sobre distorsi\'on bajo aplicaciones conformales.},
     journal = {Extracta mathematicae},
     pages = {41-52},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1987_1987_1_a13/}
}