@article{DMTCS_2018_20_2_a2,
     author = {Proctor, Robert A. and Willis, Matthew J.},
     title = {Convexity of tableau sets for type {A} {Demazure} characters (key polynomials), parabolic {Catalan} numbers},
     journal = {Discrete mathematics & theoretical computer science},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {2018},
     doi = {10.23638/DMTCS-20-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.23638/DMTCS-20-2-3/}
}