Reference: http://en.wikipedia.org/wiki/Christian_Friedrich_Schonbein Rubin, Mordecai B. (2001). "The History of Ozone. The Schönbein Period, 1839-1868". Bull. Hist. Chem. 26(1). Retrieved 2008-02-28.
Reference: http://www.cardiovascularultrasound.com/content/7/1/30#B1 Molecular structure of ozone. Srebot et al. Cardiovascular Ultrasound 2009 7:30 doi:10.1186/1476-7120-7-30