@article{CLTM_1979_1979_1_a10,
     author = {Fraile Pel\'aez, J. M.},
     title = {Ecuaciones de evoluci\'on con retardo variable.},
     journal = {Collectanea mathematica},
     pages = {199-211},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1979},
     zbl = {0456.34040},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1979_1979_1_a10/}
}