Seale TW, Abla KA, Shamim MT, Carney JM, Daly JW (1988). "3,7-Dimethyl-1-propargylxanthine: a potent and selective in vivo antagonist of adenosine analogs". Life Sciences. 43 (21): 1671–84. doi:10.1016/0024-3205(88)90478-x. PMID3193854.
Seale TW, Abla KA, Shamim MT, Carney JM, Daly JW (1988). "3,7-Dimethyl-1-propargylxanthine: a potent and selective in vivo antagonist of adenosine analogs". Life Sciences. 43 (21): 1671–84. doi:10.1016/0024-3205(88)90478-x. PMID3193854.