1. On the morphology and ultrastructure of the cell wall of Spirulina platensis
2. Fukuda, Y., A. Sekiya and M. Sakakibara; “Extraction Method of Phycocyanin from Blue-Green Algae” (in Japanese), Japan Patent Disclosure 2003-342489 (2003)
3. Fujita, K. and T. Maekawa; “Measurement of Specific Surface Area and Evaluation of CO2 Mass Transfer Coefficient on the Cell of Blue-Green Algae during Batch Culture,” Nougyoushisetsu, 27, 85–93 (1996)
4. Kato, T.; “Extraction Method of Blue Pigment (in Japanese),” Japan Patent Disclosure S52-134058 (1977)
5. Breakage of micro organisms.