1. ATP synthase, Image Credit: NDSU VCell Animation Project. 〈http://vcell.ndsu.nodak.edu/animations/etc/atpsynthase.htm〉 (accessed 27.01.14).
2. Chloroplast Diagram. 〈https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Chloroplast_%28borderless_version%29-en.svg/701px-Chloroplast_%28borderless_version%29-en.svg.png〉 (accessed 03.04.14).
3. Introduction to ozone, 〈http://www.ucar.edu/learn/1_5_1.htm 〉 with permission from the COMET Program. (accessed 27.01.14).
4. Mean value theorem, 〈https://en.wikipedia.org/wiki/Mean_value_theorem〉, (accessed 27.01.14).
5. Photorespiration wikicommons, 〈https://commons.wikimedia.org/wiki/File:Photorespiration_de.svg〉 (accessed 29.01.14).