@article{10_4064_cm_18_1_239_249,
     author = {K. Urbanik},
     title = {A characterization of a class of convolutions},
     journal = {Colloquium Mathematicum},
     pages = {239--249},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1967},
     doi = {10.4064/cm-18-1-239-249},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-18-1-239-249/}
}