@article{EXMATH_1990_1990_1_a2,
     author = {Okrasinski, W.},
     title = {Nuevas condiciones para la existencia de soluciones no triviales de algunas ecuaciones de {Volterra.}},
     journal = {Extracta mathematicae},
     pages = {7-8},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1990_1990_1_a2/}
}