@article{CLTM_1991_1991_1_a2,
     author = {Haukkanen, Pentti and Sivaramakrishnan, R.},
     title = {Multiplicaci\'on de {Cauchy} y funciones peri\'odicas (mod r).},
     journal = {Collectanea mathematica},
     pages = {33-44},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1991_1991_1_a2/}
}