Yoshitake, S., H. Fukushima, T. Kimura, E. V. Lepskaya, and T. Ko-Bayashi. “Variability of the Pennatae Diatom Gomphonema Ventricosum Gregory from Far Eastern Lakes”. Acta Botanica Croatica, vol. 68, no. 2, Oct. 2009, https://www.abc.botanic.hr/index.php/abc/article/view/130.