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@article{PIM_2000_N_S_68_82_a4, author = {Seymour Lipschutz and Wujie Shi}, title = {Note on a question of {Reinhold} {Baer} on pregroups}, journal = {Publications de l'Institut Math\'ematique}, pages = {53 }, publisher = {mathdoc}, volume = {_N_S_68}, number = {82}, year = {2000}, zbl = {1011.20002}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PIM_2000_N_S_68_82_a4/} }
Seymour Lipschutz; Wujie Shi. Note on a question of Reinhold Baer on pregroups. Publications de l'Institut Mathématique, _N_S_68 (2000) no. 82, p. 53 . http://geodesic.mathdoc.fr/item/PIM_2000_N_S_68_82_a4/