%0 Journal Article %A Clarke, Francis %A Hunton, John %A Ray, Nigel %T Extensions of umbral calculus II: double delta operators, Leibniz extensions and Hattori-Stong theorems %J Annales de l'Institut Fourier %D 2001 %P 297-336 %V 51 %N 2 %I Association des Annales de l’institut Fourier %U http://www.numdam.org/articles/10.5802/aif.1824/ %R 10.5802/aif.1824 %G en %F AIF_2001__51_2_297_0