1. Limnological studies of thermal springs of Bihar, India;Bilgrami;Proceedings of the Indian National Science Academy — Part B: Biological Sciences,1985
2. Thermophyilic Microorganism and Life to High Temperature;Brock,1978
3. Yellowstone thermal Myxophyceae;Copeland;Annals of the New York Academy of Sciences,1936
4. Geología de México: una sinopsis;Ferrusquía-Villafranca,1998
5. Flore des Diatomées;Germain,1981