Shyndanovina, I., & Lukash, O. (2023). New European locality of three rare taxa (Zygnematophyceae, Streptophyta): Cosmarium pseudoprotuberans var. sulcatum (Nordstedt) Coesel, Gonatozygon aculeatum W.N.Hastings and Pleurotaenium simplicissimum Grönblad. Ecological Questions, 34(4), 1–13. https://doi.org/10.12775/EQ.2023.048