Straka, S. Optical System Contamination: Effects, Measurements, and Control 2010. SPIE Digital Library.
Chicago-referens (17:e uppl.)Straka, Sharon. Optical System Contamination: Effects, Measurements, and Control 2010. SPIE Digital Library.
MLA-referens (9:e uppl.)Straka, Sharon. Optical System Contamination: Effects, Measurements, and Control 2010. SPIE Digital Library.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.