@article{JAC_1993__2_3_a0,
     author = {J\'ozefiak, Tadeusz and Sagan, Bruce E.},
     title = {Basic derivations for subarrangements of {Coxeter} arrangements},
     journal = {Journal of Algebraic Combinatorics},
     pages = {291--320},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_1993__2_3_a0/}
}