1. Studies on the condensed pyrimidine systems;Elion;J Am Chem Soc,1952
2. Drug induced immunologic tolerance;Schwartz;Nature,1959
3. The effect of 6MP on homograft reactions;Schwartz;J Clin Invest,1960
4. The prolongation of functional survival of canine renal homografts by 6MP;Zukoski;Surg Forum,1960
5. Inhibition of the rejection of renal homografts in dogs by Burroughs Wellcome;Caine;Surg Forum,1961