Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1920__8_167588, author = {L., Berwald}, title = {\"Uber affine {Geometrie} {XXVII.} {Liesche} {F2} {Affinnormale} un mittlere {Affinkr\"ummung}}, journal = {Mathematische Zeitschrift}, pages = {63--78}, publisher = {mathdoc}, volume = {8}, year = {1920}, zbl = {47.0661.04}, url = {http://geodesic.mathdoc.fr/item/MZ_1920__8_167588/} }
L., Berwald. Über affine Geometrie XXVII. Liesche F2 Affinnormale un mittlere Affinkrümmung. Mathematische Zeitschrift, Tome 8 (1920), pp. 63-78. http://geodesic.mathdoc.fr/item/MZ_1920__8_167588/