Silen W, Machen TE, Forte JG.  1975.  Acid-base balance in amphibian gastric mucosa.. Am J Physiol. 229(3):721-30.

Kahn T, Bosch J, Levitt MF, Goldstein MH.  1975.  Effect of sodium nitrate loading on electrolyte transport by the renal tubule.. Am J Physiol. 229(3):746-53.