Riva, C. E.; Petrig, B. (1980). "Blue field entoptic phenomenon and blood velocity in the retinal capillaries". Journal of the Optical Society of America. 70 (10): 1234–38. doi:10.1364/JOSA.70.001234. PMID7441396.
Riva, C. E.; Petrig, B. (1980). "Blue field entoptic phenomenon and blood velocity in the retinal capillaries". Journal of the Optical Society of America. 70 (10): 1234–38. doi:10.1364/JOSA.70.001234. PMID7441396.