Shyndanovina, I. and 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 (Jul. 2023), 1–13. DOI:https://doi.org/10.12775/EQ.2023.048.