@article{CLTM_1979_1979_1_a1,
     author = {Berz, Edgar},
     title = {Operadores diferenciales de funciones enteras.},
     journal = {Collectanea mathematica},
     pages = {55-94},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1979},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1979_1979_1_a1/}
}