Derivatives with Respect to Lifts of the Riemannian Metric of the FormatfG˜ =Sgf +H g on TM Over a Riemannian Manifold (M, g). Punjab University Journal of Mathematics, [S. l.], v. 51, n. 1, p. 1–8, 2025. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/398. Acesso em: 29 jun. 2025.