1. Sprays;Ambrose;Acad. Brasil. Ciencas,1960
2. The inverse problem of the calculus of variations for ordinary differential equations;Anderson;Mem. Am. Math. Soc.,1992
3. Metrisability of two-dimensional projective structures;Bryant;J. Differ. Geom.,2009
4. Projective metrizability and formal integrability;Bucataru;SIGMA,2011
5. Riemann–Finsler Geometry;Chern,2004