He, Ze; Kan, Chi-Wai; Ho, Cheuk-Lam; Wong, Wai-Yeung; Chui, Chung-Hin; Tong, Ka-Lap; So, Shu-Kong; Lee, Tik-Ho; Leung, Louis M.; Lin, Zhenyang Dyes and Pigments, 2011 , vol. 88, # 3 p. 333 - 343