Equivariant harmonic maps into the sphere via isoparametric maps. Y.L. Xin — 1993 Manuscripta mathematica
On the Gauss image of a spacelike hypersurface with constant mean curvature in Minkowski space. Y.L. Xin — 1991 Commentarii mathematici Helvetici
Regularity of p-harmonic maps into certain manifolds with positive sectional curvature. Y.L. Xin; Yang Yihu — 1995 Journal für die reine und angewandte Mathematik
Bernstein-type theorems for space-like surfaces with parallel mean curvature. Y.L. Xin; Rugang Ye — 1997 Journal für die reine und angewandte Mathematik