Gong, Z., Li, Y., Metzeltin, D. & Lange-Bertalot, H. (2013)

New species of Cymbella and Placoneis (Bacillariophyta) from late Pleistocene Fossil, China

. Phytotaxa 150 (1): 29–40. https://doi.org/10.11646/phytotaxa.150.1.2