Trukhchev, D., Georgiev, V., Krastev, A. and Mavrodieva, R. (2026) “Features of the Intra-annual Variability of the Hydrochemical and Hydrobiological State of Varna Lakes in the Period 2022–2023”, Proceedings of the Bulgarian Academy of Sciences. Sofia, Bulgaria, 79(5), pp. 603–614. doi: 10.7546/CRABS.2026.05.08.