1. T.W. Rall, Central nervous system stimulants, in: A.G. Gilman, L.S. Goodman, A. Gilman (Eds.), The Pharmacological Basis of Therapeutics, Macmillan, New York, 1980, pp. 593–607.
2. Overview of effects of theophylline;Persson;J. Allergy Clin. Immunol.,1986
3. J.E.F. Reynolds, Theobromine, theophylline, In: Martindale (Ed.), The Extra Pharmacopoeia, The Universally Acclaimed Source of Drug Information, The Pharmaceutical Press, London, 1996, pp. 1656–1665.
4. Adenosine 3′-5′ phosphate in biological materials: I. Purification and properties of cyclic 3′-5′-nucleotide phosphodiesterase and use of this enzyme to characterize adenosine 3′-5′-phosphate in human urine;Butcher;J. Biol. Chem.,1962
5. Theophylline actions on adenosine receptors;Fredholm;Eur. J. Respir. Dis.,1980