↑ Evans, Howard Ensign. Edward Osborne Wilson (col.) The Man who Loved Wasps: A Howard Ensign Evans Reader. in: Evans, Mary Alice. Big Earth Publishing, 2005. pp. 169. ISBN1555663508
↑ Nuttall, Mark. Encyclopedia of the Arctic. Routledge, 2012. pp. 1953. ISBN1579584365
↑ Egerton, Frank N. (2008). “A History of the Ecological Sciences, Part 27: Naturalists Explore Russia and the North Pacific During the 1700s”. Bulletin of the Ecological Society of America 89 (1): 39–60. doi:10.1890/0012-9623(2008)89[39:AHOTES]2.0.CO;2.
