@article{MOMA_1966__70_177313,
     author = {S.L. Gupta},
     title = {An {Addition} {Theorems} of the {Generalised} {Bessel} {Coefficients.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {8--14},
     year = {1966},
     volume = {70},
     zbl = {0147.32603},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1966__70_177313/}
}