Template:Parke et al., 1978
- Parke, M., Boalch, G.T., Jowett, R. & Harbour, D.S. 1978. The genus Pterosperma (Prasinophyceae): species with a single equatorial ala. Journal of the Marine Biological Association of the United Kingdom 58: 239–276. DOI: 10.1017/S0025315400024528 . PDF