@article{MZ_1988__199_1_173954,
     author = {Oscar Blasco},
     title = {Convolution of {Operators} and {Applications.}},
     journal = {Mathematische Zeitschrift},
     pages = {109--114},
     publisher = {mathdoc},
     volume = {199},
     number = {1},
     year = {1988},
     zbl = {0654.46026},
     url = {http://geodesic.mathdoc.fr/item/MZ_1988__199_1_173954/}
}