The INA is a card file and online reporting system maintained at the Silva Center for Phycological Documentation of the University Herbarium, University of California, Berkeley. It contains nearly 200,000 names of algae (in the broad sense).
The BPU is a card file containing bibliographic references pertaining to algal taxonomy.
Bibliographia Phycologica Universalis
KOCIOLEK, John P., & Eugene F. STOERMER
2009 (Oct. 21)
Oligotrophy: the forgotten end of an ecological spectrum
Acta Bot. Croat.
68(2): 465-472
diatoms of poor-nutrient bodies of water not well understood