1. Problems concerning the lower limit of Quaternary in China;Cao Zhaoyuan;Acta Geologica Sinica,1983
2. Palynological analysis of the Holocene sediments containing Nelumbo nucifera seeds near Pulandian, Liaodong Peninsula;Chen Chenghui;Quaternaria Sinica,1965
3. A preliminary study on the climate fluctuations during the last 5000 years in China;Chu Ko-chen;Scientia Sinica,1973