Christmann, M (2010). „Otto Wallach: Founder of Terpene Chemistry and Nobel Laureate 1910”. Angewandte Chemie International Edition. 49 (50): 9580—9586. PMID21110354. doi:10.1002/anie.201003155.
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Christmann, M (2010). „Otto Wallach: Founder of Terpene Chemistry and Nobel Laureate 1910”. Angewandte Chemie International Edition. 49 (50): 9580—9586. PMID21110354. doi:10.1002/anie.201003155.