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2. On some properties of cyclically monotonic functions;Bernstein;Izv. Akad. Nauk SSSR, Ser. Mat.,1950
3. On zero type sets of Laguerre polynomials;Brown;Duke Math. J.,1968
4. New generating functions for classical polynomials;Brown,1969
5. Some generating functions for Laguerre polynomials;Carlitz;Duke Math. J.,1968