CARRERAS, Francisco J.; NAVEIRA, Antonio M. On the volume of a small extrinsic ball in a hypersurface of the hyperbolic space. Mathematica Scandinavica, Berkeley, CA, United States, v. 83, n. 2, p. 220–234, 1998. DOI: 10.7146/math.scand.a-13852. Disponível em: https://journals.msp.org/mscand/article/view/976. Acesso em: 25 jul. 2026.