1. Agardh, C.A., 1824. Systema Algarum. Literis Berlingianis, Lundæ, 312 pp.
2. Detrital zircon dating and tracing the provenances of dinosaur bone beds from the Late Cretaceous Wangshi Group in Zhucheng, Shandong;An;Geological Review,2016
3. Charae Australes et Antarcticae, or characters and observations on the Characeae of Australia and the southern circumpolar regions;Braun;Hooker’s Journal of Botany and Kew Garden Miscellany,1849
4. Fragmente einer Monographie der Characeen;Braun,1882
5. Cao, G.Y., 2018. Geochronology and geochemistry of the Mesozoic Qingshan Group volcanic rocks in Shandong Province. PhD thesis, Chinese Academy of Geological Sciences, Beijing, 179 pp. (in Chinese, with English abstract).