[1] D. Bao, C. Robles, Z. Shen, Zermelo navigation on Riemannian manifolds, J. Diff. Geom., 66(3) (2004) 377-435.
[2] S. Basco, X. Cheng, Z. Shen, Curvature properties of (α, β)-metrics, In “Finsler Geometry, Sapporo 2005-In Memory of Makoto Matsumoto”, ed. S. Sabau and H. Shimada, Advanced Studies in Pure Mathematics 48, Mathematical Society of Japan, (2007) 73-110.
[3] V. N. Berestovskii , Yu. G. Nikonorov, Killing vector fields of constant length on Riemannian manifolds, (Russian) Sibirsk. Mat. Zh. 49(3) (2008) 497-514; translation in Sib. Math. J., 49(3) (2008) 395-407.
[4] B. Li, Z. Shen, On Randers metrics of quadratic Riemannian curvature, Internat. J. Math., 20(3) (2009) 369-376.
[5] M. Matsumoto, Foundations of Finsler geometry and special Finsler spaces, Kaiseisha, Japan, 1986.
[6] B. Rezaei, A. Razavi, N. Sadeghzadeh, On Einstein (α, β)-metrics, Iranian Journal of Science and Technology, 31 (2007) 403-412.