Characteristics of carbon and oxygen isotopes of the Ordovician carbonate rocks in Ordos and their implication
Chen Qiang, Zhang Huiyuan, Li Wenhou, Hao Songli, Liu Zhuo
JOURNAL OF PALAEOGEOGRAPHY . 2012, (1): 117 -124 .  DOI: 10.7605/gdlxb.2012.01.010