Elion GB. Enzymatic and metabolic studies with allopurinol. Ann Rheum Dis 1966; 25: 608-14.
Hille R, Massey V Tight binding inhibitors of xanthine oxidase. Pharmacol Ther 1981; 14: 249-63.
Borges F Fernandes E, Roleira F. Progress towards the discovery of xanthine oxidase inhibitors. Curr Med Chem 2002; 9: 195-217.
Hande KR, Noone RM, Stone WJ. Severe allopurinol toxicity. Description and guidelines for prevention in patients with renal insufficiency. Am J Med 1984; 76: 47-56.