@article{RCM_1968__2_181557,
     author = {Jaime Lesmes},
     title = {Sobre una clase de operadores de convolci\'on, {I}},
     journal = {Revista colombiana de matematicas},
     pages = {51--69},
     publisher = {mathdoc},
     volume = {2},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/RCM_1968__2_181557/}
}