@article{AM2_1978__17_136738,
     author = {I.G. Rosenberg},
     title = {On generating large classes of {Sheffer} functions.},
     journal = {Aequationes mathematicae},
     pages = {164--181},
     publisher = {mathdoc},
     volume = {17},
     year = {1978},
     zbl = {0386.08005},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__17_136738/}
}