Drozdenko, T., Fedorov, S., & Kek, I. (2021). SEASONAL DYNAMICS OF PHYTOPLANKTON AND SOME HYDROCHEMICAL INDICATORS OF THE PEIPSI-PSKOV LAKE.
ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference,
1, 50-54.
https://doi.org/10.17770/etr2021vol1.6557