GILLISPIE, CHARLES COULSTON. “LAMARCK AND DARWIN IN THE HISTORY OF SCIENCE.” American Scientist 46, no. 4 (1958): 388–409. http://www.jstor.org/stable/27827201.
Simpson, George Gaylord. “Lamarck, Darwin and Butler: Three Approaches to Evolution.” The American Scholar 30, no. 2 (1961): 238–49. http://www.jstor.org/stable/41208836.
MacKinney, H. Lewis. Lamarck to Darwin: Contributions to Evolutionary Biology 1809-1959. Coronado press, 1971.