@article{GAMA_1980_1980_1_a1,
     author = {Guivernau, Amelia},
     title = {Transformaciones que conservan el \'area.},
     journal = {Gaceta matem\'atica},
     pages = {63-67},
     publisher = {mathdoc},
     volume = {32},
     number = {5-6},
     year = {1980},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1980_1980_1_a1/}
}