@article{FORUM_1997__9_2_141814,
     author = {Karl-Hermann Neeb},
     title = {A general non-linear convexity theorem.},
     journal = {Forum mathematicum},
     pages = {613--640},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1997},
     zbl = {0888.22005},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1997__9_2_141814/}
}