@article{1102986149, author = {Kelly, Paul and Straus, E. G.}, title = {Curvature in Hilbert geometries. II.}, journal = {Pacific J. Math.}, volume = {27}, number = {3}, year = {1968}, pages = { 549-552}, language = {en}, url = {http://dml.mathdoc.fr/item/1102986149} }
Kelly, Paul; Straus, E. G. Curvature in Hilbert geometries. II.. Pacific J. Math., Tome 27 (1968) no. 3, pp. 549-552. http://gdmltest.u-ga.fr/item/1102986149/