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@article{MZ_1967__100_170818, author = {David A. Foulser}, title = {A {Generalization} of {Andr\'e's} {Systems.}}, journal = {Mathematische Zeitschrift}, pages = {380--395}, publisher = {mathdoc}, volume = {100}, year = {1967}, zbl = {0152.18903}, url = {http://geodesic.mathdoc.fr/item/MZ_1967__100_170818/} }
David A. Foulser. A Generalization of André's Systems.. Mathematische Zeitschrift, Tome 100 (1967), pp. 380-395. http://geodesic.mathdoc.fr/item/MZ_1967__100_170818/