Kunzinger, M. .; Schichl, H. .; Steinbauer, R. .; Vickers, J. A. . Global Gronwall Estimates for Integral Curves on Riemannian Manifolds. Rev. mat. complut. 2006, 19 ,1, 133-137. https://doi.org/10.5209/rev_REMA.2006.v19.n1.16639.