Photosynthetic PigmentsUniversity of California Museum of Paleontology, Glossary. 1994–2006. Regents of the University of California Berkeley. Viitattu 2.9.2016.
Walker T: Plants: A Very Short Introduction, s. 7. Oxford University Press, 2012. ISBN 9780199584062Teoksen verkkoversio (viitattu 2.9.2016). (englanniksi)