1. 1) a) Williams M. (ed.), “Adenosine and Adenosine Receptors,” The Humana Press, Clifton, New Jersey, 1990, pp. 1-15
2. b) Dalziei H.H., Westfall D.P., Pharmacol. Rev., 46, 449-466 (1994).
3. 2) a) Fredholm B.B., Abbracchio M.P., Burnstock G., Daly J.W., Harden K., Jacobson K.A., Leff P., Williams M., Pharmacol. Rev., 46, 143-156 (1994)
4. b) Collis M.G., Hourani S.M.O., Trends. Pharmacol. Sci., 14, 360-366 (1993).
5. 3) a) Stehle J.H., Rivkees S.A., Lee J.J., Weaver D.R., Deeds J.D., Reppert S.M., Mol. Endocr., 6, 384-393 (1992)