1. Equivalence problem for systems of second-order ordinary differential equations, Encyclopedia of Mathematics;Antonelli,2000
2. The Theory of Sprays and Finsler Spaces with Applications in Physics and Biology;Antonelli,1993
3. An Introduction to Riemann–Finsler Geometry;Bao,2000
4. Observations sur le mémoir précédent;Cartan;Math. Z.,1933
5. Sur la géometrie d’un système d’equations differentialles du second ordre;Chern;Bull. Sci. Math.,1939