Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1980__174_172998, author = {Johannes Siemons}, title = {Normal {Subgroups} of {Triply} {Transitive} {Permutation} {Groups} of {Degree} {Divisible} by 3.}, journal = {Mathematische Zeitschrift}, pages = {95--104}, publisher = {mathdoc}, volume = {174}, year = {1980}, zbl = {0423.20002}, url = {http://geodesic.mathdoc.fr/item/MZ_1980__174_172998/} }
Johannes Siemons. Normal Subgroups of Triply Transitive Permutation Groups of Degree Divisible by 3.. Mathematische Zeitschrift, Tome 174 (1980), pp. 95-104. http://geodesic.mathdoc.fr/item/MZ_1980__174_172998/