Mayr, E. Darwin's five theories of evolution: Ernst Mayr. The Darwinian heritage : [incl. proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985).

Mayr, Ernst. "Darwin's Five Theories of Evolution: Ernst Mayr." The Darwinian Heritage : [incl. Proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985) .

Mayr, Ernst. "Darwin's Five Theories of Evolution: Ernst Mayr." The Darwinian Heritage : [incl. Proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985), .