@article{RSMUP_1993__89__19_0,
     author = {David, C.},
     title = {$T_3$-systems of finite simple groups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {19--27},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {89},
     year = {1993},
     mrnumber = {1229039},
     zbl = {0804.20028},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1993__89__19_0/}
}