Whittle, BJ; Silverstein, AM; Mottola, DM; Clapp, LH; (2012) Binding and activity of the prostacyclin receptor (IP) agonists, treprostinil and iloprost, at human prostanoid receptors: Treprostinil is a potent DP1 and EP2 agonist. Biochemical Pharmacology , 84 (1) pp. 68-75. 10.1016/j.bcp.2012.03.012.