Yu 1987. Late Jurassic and Early Cretaceous fresh water gastropods (Mollusca) from western Liaoning Province, China. Yu, Xihan; Wang, Wuli; Liu, Xianting; Zhang, Wu[Eds]. Mesozoic stratigraphy and palaeontology of western Liaoning, Volume 3., Geological Publishing House, Beijing., 1987: 1-386. Chapter pagination: 29-116