1. Kant als Naturforscher;Adickes,1924
2. Nature's purposes: Analyses of function and design in biology,1998
3. Über Entwicklungsgeschichte der Thiere;Baer,1828
4. Kant's characterization of natural ends;Beisbart;Kant Yearbook,2009
5. Kant on proper Science: Biology in the critical philosophy and the Opus Postumum;van den Berg,2014