@article{CM_1959-1960__14__228_0, author = {Hughes, N. J. S.}, title = {The {Jordan-H\"older-Schreier} theorem for general algebraic systems}, journal = {Compositio Mathematica}, pages = {228--236}, publisher = {Kraus Reprint}, volume = {14}, year = {1959-1960}, mrnumber = {130845}, zbl = {0108.01804}, language = {en}, url = {http://www.numdam.org/item/CM_1959-1960__14__228_0/} }
Hughes, N. J. S. The Jordan-Hölder-Schreier theorem for general algebraic systems. Compositio Mathematica, Tome 14 (1959-1960), pp. 228-236. http://www.numdam.org/item/CM_1959-1960__14__228_0/
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