[6] Brozos-Vázquez, M., García-Río, E., Gilkey, P., Nikčević, S., Vázquez-Lorenzo, R.: 
The Geometry of Walker Manifolds. Synthesis Lectures on Mathematics and Statistics 5, Morgan & Claypool Publishers, San Rafael (2009). 
DOI 10.2200/S00197ED1V01Y200906MAS005 | 
MR 2656431 | 
Zbl 1206.53039[14] Falcitelli, M., Pastore, A. M.: 
On the tangent bundle and on the bundle of the linear frames over an affinely connected manifold. Math. Balk., New Ser. 2 (1988), 336-356. 
MR 0997625 | 
Zbl 0677.53040[17] O'Neill, B.: 
Semi-Riemannian Geometry. With Applications to Relativity. Pure and Applied Mathematics 103, Academic Press, New York (1983). 
MR 0719023 | 
Zbl 0531.53051[19] Yano, K., Ishihara, S.: 
Tangent and Cotangent Bundles. Differential Geometry. Pure and Applied Mathematics 16, Marcel Dekker, New York (1973). 
MR 0350650 | 
Zbl 0262.53024