@article{AM2_1977__16_136711,
     author = {I.G. Rosenberg},
     title = {On generating large classes of {Sheffer} functions. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {316--318},
     year = {1977},
     volume = {16},
     url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136711/}
}