@article{GRSME_2004_2004_1_a20,
     author = {Hern\'andez, Eugenio and  Soria, Fernando},
     title = {Miguel de {Guzm\'an} y la teor{\'\i}a de diferenciaci\'on de integrales.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     publisher = {mathdoc},
     volume = {7},
     year = {2004},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_2004_2004_1_a20/}
}