Helan Shan que : Ningxia si chou zhi lu - Yang, Chuntang (Xianggang da xue mei shu bo wu guan, 2008)
Text by Chen Yongyun.
Catalog of exhibition jointly presented by Ningxia Cultural Relics Bureau and University Museum and Art Gallery, Univ. of Hong Kong; held Dec. 13, 2008-Mar. 15, 2009 at latter.