Vishnyakov, V. S. (2022).

Expended range of Gomphonema firmum (Bacillariophyceae), once considered a Lake Baikal endemic, with notes on the identity of G. lanceolatum var. maximum

. Phytotaxa, 530(2), 213–220. https://doi.org/10.11646/phytotaxa.530.2.8