@article{CLTM_2001_2001_1_a16,
     author = {Gressman, Philip},
     title = {Ond{\'\i}culas sobre los enteros.},
     journal = {Collectanea mathematica},
     pages = {257-288},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_2001_2001_1_a16/}
}