@article{CM_1993__89_3_301_0,
     author = {Van den Ban, E. P. and Schlichtkrull, H.},
     title = {Convexity for invariant differential operators on semisimple symmetric spaces},
     journal = {Compositio Mathematica},
     pages = {301--313},
     publisher = {Kluwer Academic Publishers},
     volume = {89},
     number = {3},
     year = {1993},
     mrnumber = {1255699},
     zbl = {0798.58083},
     language = {en},
     url = {http://www.numdam.org/item/CM_1993__89_3_301_0/}
}