Kenttamaa, Hilkka I. (2020). K. H. Nemeh (Ed.), American Men & Women of Science: A Biographical Directory of Today’s Leaders in Physical, Biological and Related Sciences (38th ed., Vol. 8, p. 5779). Gale. Artikkelin maksullinen verkkoversio, viitattu 28.4.2022.
Antti Jaakko Koivo. (2008). American Men & Women of Science: A Biographical Directory of Today's Leaders in Physical, Biological, and Related Sciences. Gale. Artikkelin maksullinen verkkoversio, viitattu 27.4.2022.