↑Adrian K, Bernhard MK, Breitinger HG, Ogilvie A (Junho de 2000). «Expression of purinergic receptors (ionotropic P2X1-7 and metabotropic P2Y1-11) during myeloid differentiation of HL60 cells». Biochimica et Biophysica Acta. 1492 (1): 127–38. PMID11004484. doi:10.1016/S0167-4781(00)00094-4
↑Ralevic V, Burnstock G (Setembro de 1998). «Receptors for purines and pyrimidines». Pharmacological Reviews. 50 (3): 413–92. PMID9755289