Kwaśniewski, A. K.; Grądzka, E.: Further remarks on extended umbral calculus.
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Slovák, Jan
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Circolo Matematico di Palermo, Palermo, 2002.
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Kwaśniewski, A. K.: On deformations of finite operator calculus of Rota.
(English).
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Slovák, Jan
and Čadek, Martin (eds.): Proceedings of the 19th Winter School "Geometry and Physics".
Circolo Matematico di Palermo, Palermo, 2000.
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