1. Decomposition of cut loci;Bishop,1977
2. C. Cortés, D.I. Grima, F. Hurtado, A. Márquez, F. Santos, J. Valenzuela, Transforming triangulations of polygons on nonplanar surfaces, Discrete Appl. Math. (2002), submitted for publication. Preliminary version available at http://www.us.es/dma1euita/Miembros/ccortes/ccortes.htm, 2002
3. C. Cortés, A. Márquez, J. Valenzuela, Euclidean position in euclidean 2-orbifolds, Extended version available at http://www.us.es/dma1euita/Miembros/ccortes/ccortes.htm, 2003
4. Geometrı́a diferencial de curvas y superficies;do Carmo,1976
5. Dirichlet regions in manifolds without conjugate points;Ehrlich;Comment. Math. Helvetici,1979