Kober, Adolf (1942). "Mannheim." The Universal Jewish Encyclopedia. Ed. Isaac Landman. Vol. 7. New York: Universal Jewish Encyclopedia, Inc. p. 330-332; here: p. 331.
Ihde, Aaron J. (February 1961). "The Karlsruhe Congress: A centennial retrospective". Journal of Chemical Education. 38 (2): 83–86. Bibcode:1961JChEd..38...83I. doi:10.1021/ed038p83.
Ihde, Aaron J. (February 1961). "The Karlsruhe Congress: A centennial retrospective". Journal of Chemical Education. 38 (2): 83–86. Bibcode:1961JChEd..38...83I. doi:10.1021/ed038p83.