@article{10_4153_CMB_1986_077_4,
     author = {Moran, Siegfried},
     title = {Pre-Tits {Systems}},
     journal = {Canadian mathematical bulletin},
     pages = {486--494},
     year = {1986},
     volume = {29},
     number = {4},
     doi = {10.4153/CMB-1986-077-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1986-077-4/}
}