MathSciNet bibliographic data MR2262847 (2007j:32039) 32V40 Huang, Xiaojun; Ji, Shanyu Every real ellipsoid in \$\Bbb C\sp 2\$$\Bbb C\sp 2$ admits CR umbilical points. Trans. Amer. Math. Soc. 359 (2007), no. 3, 1191–1204 (electronic). Article

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