@article{duchamp-poinsot-Ladder,
author = {G\'erard H. E. Duchamp and Laurent Poinsot and Allan I. Solomon and Karol A. Penson and Pawel Blasiak and Andrzej Horzela},
title = {Ladder Operators and Endomorphisms in Combinatorial Physics},
journal = {Discrete Mathematics and Theoretical Computer Science},
volume = {12},
number={2},
pages = {23--46},
year = {2010}
}