1. Berenbaum M. Adaptive significance of midgut pH in larval Lepidoptera. Am Nat 1980;115:138–146.
2. Stewart PA. How To Understand Acid-Base – A Quantitative Acid-Base Primer for Biology and Medicine. New York, USA; Elsevier 1981.
3. Boron WF, Boulpaep, EL. Medical Physiology – A cellular and molecular approach. Philadelphia, U.S.A. Saunders 2003: Figure 38-2.
4. Stetson DL, Steinmetz PR. Alpha and beta types of carbonic anhydrase-rich cells in turtle bladder. Am J Physiol 1985; 249: F553–F565.
5. Brown D, Sabolic I, Gluck S. Polarized targeting of V-ATPase in kidney epithelial cells. J Exp Biol 1992;172: 231–243.