Yoshitake, Sakiko, Hiroshi Fukushima, Tsutomu Kimura, Ekatarina V. Lepskaya, and Tuyako Ko-Bayashi. 2009. “Variability of the Pennatae Diatom Gomphonema Ventricosum Gregory from Far Eastern Lakes”. Acta Botanica Croatica 68 (2). https://www.abc.botanic.hr/index.php/abc/article/view/130.