@article{GDZPPN002183633, title = {Operators involving entire functions.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, volume = {238}, year = {1969}, pages = {115-132}, zbl = {0174.19601}, url = {http://dml.mathdoc.fr/item/GDZPPN002183633} }
Kober, H. Operators involving entire functions.. Journal für die reine und angewandte Mathematik, Tome 238 (1969) pp. 115-132. http://gdmltest.u-ga.fr/item/GDZPPN002183633/