Maton, Anthea; Jean Hopkins; Charles William McLaughlin; Susan Johnson; Maryanna Quon Warner; David LaHart; Jill D. Wright (1993). Human Biology and Health. Englewood Cliffs, New Jersey: Prentice Hall. ISBN0-13-981176-1.
Adar, SD; Klein, R; Klein, BE; Szpiro, AA; Cotch, MF (2010). «Air Pollution and the microvasculature: a crosssectional assessment of in vivo retinal images in the population based multiethnic study of atherosclerosis (MESA)». PLoS Med7 (11): e1000372. doi:10.1371/journal.pmed.1000372.