1. Blum , J. L. 1953 The ecology of algae growing in the Saline River, Michigan, with special reference to water pollution Ph.D. Thesis
2. Algal periodicity in certain ponds and streams;Brown;Bull. Torrey Bot. Club,1908
3. Die algenflora des sauerlaendischcn gebirgsbaches;Budde;Arch. Hydrobiol.,1928
4. Studies in the ecology of rivers. II. The microflora of rivers with special reference to the algae of the river bed;Butcher;Ann. Bot.,1932
5. Faridi , M. A. F. 1961 A monograph of the fresh-water species of Cladophora and Rhizoclonium Ph.D. Thesis