General
Checklist of phytoplankton in the Skagerrak-Kattegat
The IOW-Image Gallery of Baltic Microalgae
Cyanobacterial Harmful Algae Blooms
Finnish Phytoplankton Society's brown trip 2012
Search sites
Literature
A monograph of the British Desmidiaceae (1911) Vol. 4
A Monograph of the British Desmidiaceae (1923) Vol. 5
Methods & quality assurance
Water management 1_2006: Phytoplankton research methods, Liisa Lepistö et al.