Some constancy results for nematic liquid crystals and harmonic maps Kai Seng Chou; Xi-Ping Zhu — 1995 Annales de l'I.H.P. Analyse non linéaire
A logarithmic Gauss curvature flow and the Minkowski problem Kai-Seng Chou; Xu-Jia Wang — 2000 Annales de l'I.H.P. Analyse non linéaire