^S. Cohen, H. B. Lewis. The nitrogenous metabolism of the earthworm (Lumbricus terrestris). The Journal of Biological Chemistry. 1949-8, 180 (1): 79–91 [2019-02-13]. ISSN 0021-9258. PMID 18133376. (原始内容于2020-03-25).请检查|date=中的日期值 (帮助)
^S. Cohen, H. B. Lewis. The nitrogenous metabolism of the earthworm (Lumbricus terrestric). II. Arginase and urea synthesis. The Journal of Biological Chemistry. 1950-6, 184 (2): 479–484 [2019-02-13]. ISSN 0021-9258. PMID 15428427. (原始内容于2020-03-25).请检查|date=中的日期值 (帮助)
^Biochemist and Nobel Prize winner Stanley Cohen dies in Nashville at age 97. 田納西人日報. 2019-02-05 [2019-02-05].