1. X. Cheng, Z. Shen, On Douglas metrics. Publ. Math. Debr. 66, 503–512 (2007)
2. X. Cheng, Z. Shen, Randers metrics with special curvature properties. Osaka J. Math. 40, 87–101 (2003)
3. X. Chen, X. Mo, Z. Shen, On the flag curvature of Finsler metrics of scalar curvature. J. Lond. Math. Soc. 68, 762–780 (2003)
4. X. Cheng, Z. Shen, Finsler Geometry, An Approach via Randers Space (Science Press, Beijing, 2012)
5. S.S. Chern, Z. Shen, Riemann-Finsler Geometry. Nankai Tracts in Mathematics, vol. 6 (World Scientific, Hackensack, 2005), x+192 pp