@article{DMTCS_2013_special_264_a88,
     author = {Biane, Philippe and Cheballah, Hayat},
     title = {Gog, {Magog} and {Sch\"utzenberger} {II:} left trapezoids},
     journal = {Discrete mathematics & theoretical computer science},
     publisher = {mathdoc},
     volume = {DMTCS Proceedings vol. AS, 25th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2013)},
     year = {2013},
     doi = {10.46298/dmtcs.12817},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.12817/}
}