1. Abbassi, M., T., K., Note on the classification theorems of g-natural metrics on the tangent bundle of a Riemannian manifold (M; g), Comment. Math. Univ. Carolin. 45(2004), 591-596.
2. Abbassi, M., T., K., Sarih, M., On some hereditary properties of Riemannian g-natural metrics on tangent bundles of Riemannian manifolds, Differential Geom. Appl. 22(2005), 19-47.
3. Abbassi, M., T., K., Sarih, M., On natural metrics on tangent bundles of Riemannian manifolds, Arch. Math. 41(2005), 71-92.
4. Dida, M., H., Hathout, F., Djaa, M., On the Geometry of the Second Order Tangent Bundle with the Diagonal lift Metric, Int. Journal of Math. Analysis. 3(2009), 443-456.
5. Dombrowski, P., On the Geometry of the Tangent Bundle, J. Reine Angew Math. 210(1962), 73-88.