@article{GDZPPN002475030, title = {An Addition Theorems of the Generalised Bessel Coefficients.}, journal = {Monatshefte f\"ur Mathematik}, volume = {70}, year = {1966}, pages = {8-14}, zbl = {0147.32603}, url = {http://dml.mathdoc.fr/item/GDZPPN002475030} }
Gupta, S.L. An Addition Theorems of the Generalised Bessel Coefficients.. Monatshefte für Mathematik, Tome 70 (1966) pp. 8-14. http://gdmltest.u-ga.fr/item/GDZPPN002475030/