MathSciNet bibliographic data MR2629509 (2011e:53043) 53C21 (35J60) Ge, Yuxin; Lin, Chang-Shou; Wang, Guofang On the $\sigma\sb 2$$\sigma\sb 2$-scalar curvature. J. Differential Geom. 84 (2010), no. 1, 45–86. Article

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