@article{ITA_2008__42_3_631_0,
     author = {Thi Ha Duong Phan},
     title = {Two sided sand piles model and unimodal sequences},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {631--646},
     publisher = {EDP-Sciences},
     volume = {42},
     number = {3},
     year = {2008},
     doi = {10.1051/ita:2008019},
     mrnumber = {2434039},
     zbl = {1149.68408},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ita:2008019/}
}