@article{CM_1939__6__93_0, author = {Hille, Einar}, title = {Bilinear formulas in the theory of the transformation of Laplace}, journal = {Compositio Mathematica}, pages = {93--102}, publisher = {Johnson Reprint Corporation}, volume = {6}, year = {1939}, zbl = {0019.16902}, language = {en}, url = {archive.numdam.org/item/CM_1939__6__93_0/} }
Hille, Einar. Bilinear formulas in the theory of the transformation of Laplace. Compositio Mathematica, Tome 6 (1939) , pp. 93-102. http://archive.numdam.org/item/CM_1939__6__93_0/