Cobb LA، Thomas GI، Dillard DH، Merendino KA، Bruce RA (1959). "An evaluation of internal-mammary-artery ligation by a double-blind technic". New England Journal of Medicine. ج. 260 ع. 22: 1115–8. DOI:10.1056/NEJM195905282602204. PMID:13657350.
Cobb LA، Thomas GI، Dillard DH، Merendino KA، Bruce RA (1959). "An evaluation of internal-mammary-artery ligation by a double-blind technic". New England Journal of Medicine. ج. 260 ع. 22: 1115–8. DOI:10.1056/NEJM195905282602204. PMID:13657350.