1. Effect of aminophylline on urinary excretion of epinephrine and norepinephrine in man;Atuk;Circulation,1967
2. Differential effects of tetrodotoxin on sympathomimetic actions of nicotine and tyramine;Bell;Brit. J. Pharmacol.,1968
3. Effect of caffeine and theophylline on peripheral catecholamines;Berkowitz;European J. Pharmacol.,1971
4. Mechanism of sympathomimetic responses of isolated guinea pig atria to nicotine and dimethylphenylpiperazinium iodide;Bhagat;Brit. J. Pharmacol.,1967
5. Cardiac automaticity effects of caffeine and nicotine. 1. Caffeine influence upon the response of the sino-auricular strip;Cheney;J. Pharmacol. Exptl. Therap.,1935