REFERÊNCIAS BIBLIOGRÁFICAS 71
[14] E. Hopf, Elementare Bemerkunge über die Lösungen partieller Differentialgleichungen zwei-
ter Ordnung vom elliptischen Typus, Sitz. Ber. Preuss. Akad. Wissensch. Berlin. Math.-Phys.
Kl., 19, 147–152, 1927.
[15] H. Hopf, Differential geometry in the large, Lecture Notes in Mathematics, 1000, S prin ger-
Verlag, Berlin, 1989.
[16] W.Y. Hsiang, Z.H. Teng and W.C.Yu, New examples of cons tant mean curvature im mersion s
of (2k − 1)-spheres into Euclidean 2k-space. Ann. of Math., 117, 609–625, 1983.
[17] C.C. Hsiung, Some integral formulas for closed hypersurfaces, Math. Scand., 2, 286–294,
1954.
[18] N. Kapouleas, Compact constant mean curvature surfaces in Euclidean three-space, J. Dif-
ferential Geom., 33, 683–715, 1991.
[19] N. Kapouleas, Constant mean curvature surfaces constructed by fusing Wente tori, Invent.
Math., 119, 443–518, 1995.
[20] N.J. Korevaar, Sphere theorems via Alexandrov for constant Weingarten curvature hyper-
surfaces: Appendix to a note of A. Ros, J. Differential Geom., 27, 221–223, 1988.
[21] K. R. F. Leão, O princípio da tangência e aplicações, Dissertação de Mestrado, IMPA, Rio
de Janeiro, 1983.
[22] F. Fontenele and S.L. Silva, A tangency principle and applications, Illinois J. Math. , 45,
213–228, 2001.
[23] M.L. Leite, The tangency principle for hypersurfaces with a null intermediate curvature, XI
Escola de Geometria Diferencial, Brasil, 2000.
[24] E.L. Lima, Curso de Análise, Volume 2. Rio de Janeiro, IMPA, CNPq, 1981.
[25] E.L. Lima, Duas novas demonstrações do Teorema de Jordan-Brouwer no caso diferenciável,
Matemática Universitária, 4, 89–105, 1986.
[26] S. Montiel an d A. Ros, Compact hypersurfaces: the Alexandrov theorem for higher order
mean curvatures, in Differential geometry, Pitman Monogr. Surveys Pure App l. Math., 52,
279–296, Longman Sci. Tech., Harlow, 1991.
[27] S.Montiel and A. Ros, Curves and surfaces, Graduate Studies in Mathematics, 69. American
Mathematical Society, Providence, RI; Real Sociedad Matemática Española, Madrid, 2005.
[28] R.C. Reilly, Applications of the Hessian operator in a Riemannian manifold, Indiana Univ.
Math. J., 26, 459–472, 1977.
[29] A. Ros, Compact hypersurfaces with constant higher order mean curvatures, Rev. Mat.
Iberoamericana, 3, 447–453, 1987.