The Comparison of 6-Mercaptopurine with the Combination of 6-Mercaptopurine and Azaserine in the Treatment of Acute Leukemia in Children: Results of a Cooperative Study - Heyn, R. M.; Brubaker, C. A.; Burchenal, J. H.; Cramblett, H. G.; Wolff, J. A. (Blood, 1960)
and remaining members of Leukemia Cooperative Study Group A