Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1962__78_170033, author = {W. Greve}, title = {Partial betweenness groups.}, journal = {Mathematische Zeitschrift}, pages = {305--318}, publisher = {mathdoc}, volume = {78}, year = {1962}, zbl = {0104.02603}, url = {http://geodesic.mathdoc.fr/item/MZ_1962__78_170033/} }
W. Greve. Partial betweenness groups.. Mathematische Zeitschrift, Tome 78 (1962), pp. 305-318. http://geodesic.mathdoc.fr/item/MZ_1962__78_170033/