GONG, Z., Y. LI, D. METZELTIN, and H. LANGE-BERTALOT. “New Species of <em>Cymbella</em> and <em>Placoneis</Em> (Bacillariophyta) from Late Pleistocene Fossil, China”. Phytotaxa, vol. 150, no. 1, Dec. 2013, pp. 29–40, doi:10.11646/phytotaxa.150.1.2.