1. Baer, H.P., Drummond, G.I., and Duncan, E.L., Molec. Pharmac.2 (1966) 67.
2. Sullivan, J.M., and Alpers, J.B., J. biol. Chem.246 (1971) 3057.
3. Baer, H.P., and Drummond, G.I., Proc. Soc. exp. Biol. Med.127 (1968) 33.
4. Rubio, R., Belardinelli, L., Thompson, C.I., and Berne, R.M., in: Physiological and regulatory functions of adenosine nucleotides, p. 167. Eds. H.P. Baer and G.I. Drummond. Raven Press, New York 1978.
5. Moos, G., and Feng, I.M., Analyt. Biochem.87 (1978) 272.