Jieming Cao, Hongmei Ji, Jinsong Liu, Mingbo Zheng, Xin Chang, Xianjia Ma, Aimin Zhang, Qinhua Xu,
Controllable syntheses of hexagonal and lamellar mesostructured lanthanum oxide Materials Letters. ,vol. 59, pp. 408- 411 ,(2005) ,
10.1016/J.MATLET.2004.09.034