Suzuki R, Sikandar S, Dickenson AH. Nociception: basic principles. In: Bruera ED, Portenoy RK (eds) Cancer Pain Assessment and Management. Cambridge University Press . Cambridge 2010, P 6.
Adapted from Wikipedia, the free encyclopedia. Internet. Accessed on January 18, 2016.
Adenosine 5-triphosphate (ATP). IAHPC Pallipedia. https://pallipedia.org/adenosine-5-triphosphate-atp/. Accessed