Template:Pia, 1936a
- Pia, J. 1936. Description of the algae. In: Rama Rao, L. & Pia, J.: Fossil algae from the uppermost Cretaceous beds (the Niniyur group) of the Trichinopoly district, South. India. Memoirs of the Geological Survey of India. Palaeontologia Indica N.S. 21(4): 13–44.