@article{RSMUP_1989__81__1_0,
     author = {Raina, R. K.},
     title = {Extension of certain classes of generating functions},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {1--7},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {81},
     year = {1989},
     mrnumber = {1020180},
     zbl = {0682.33004},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1989__81__1_0/}
}