Charles E. Mitchell

PATTERNS AND PROCESSES OF LATEST ORDOVICIAN GRAPTOLITE EXTINCTION AND RECOVERY BASED ON DATA FROM SOUTH CHINA

H. Sheets, C. Mitchell, Chen Xu, 2005, Journal of Paleontology.

HIRNANTIAN (LATEST ORDOVICIAN) GRAPTOLITES FROM THE UPPER YANGTZE REGION, CHINA

Chen Xu, Fan Junxuan, M. Melchin, 2005 .