中国科学院数学与系统科学研究院期刊网
Symmetry and Transitive Properties of Monohedral f-triangulations of the Riemannian Sphere
Ana M.BREDA, J.M.SIGARRETA
Acta Mathematica Sinica . 2009, (10): 1609 -1616 .  DOI: 10.1007/s10114-009-7496-x