Silen, W., T. E.  Machen, and J. G.  Forte. 1975. ?Acid-base balance in amphibian gastric mucosa.?. Am J Physiol 229(3):721-30.

Makar, A. B., K. E.  McMartin, M.  Palese, and T. R.  Tephly. 1975. ?Formate assay in body fluids: application in methanol poisoning.?. Biochem Med 13(2):117-26.