Links
[1] https://www.hootsgo.org/?q=node/6314
[2] https://www.elsevierhealth.com/media/us/samplechapters/9780323053716/Chapter%2003.pdf
[3] http://www.ib.bioninja.com.au/standard-level/topic-3-chemicals-of-life/32-carbohydrates-lipids-and.html
[4] http://www.biology.iupui.edu/biocourses/N100/2k4ch3carbolipidnotes.html