References
- Knudson, B. M. (1952): The Diatom Genus Tabellaria. I Taxonomy and Morphology. Ann. Bot. Lond. 16: 421–440.
- Knudson, B. M. (1953a): II Taxonomy and Morphology of the Plankton Varieties. Ann. Bot. Lond. 17: 131–155.
- Knudson, B. M. (1953b): III Problems of infra-specific Taxonomy and Evolution in T. flocculosa. Ann. Bot. Lond. 17: 597–609.