%0 Journal Article %A Thi Ha Duong Phan %T Two sided sand piles model and unimodal sequences %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 2008 %P 631-646 %V 42 %N 3 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/ita:2008019/ %R 10.1051/ita:2008019 %G en %F ITA_2008__42_3_631_0