by Xie, Caifu, Zhu, Jinchu, Ding, Shijiang, Zhang, Yeming, Fu, Tai’an, Li, Zhihong
Published in Chinese science bulletin (01.10.2006)

by Zhao Yu, Zhang Li-xin, Li Zhi-fu (Taishan Medical College, Tai'an (China), Institute of Chemsitry and Chemical Engineering)
Published in Shandong nong ye da xue xue bao (01.04.2005)