1. Amazon rainforest cosmetics: chemical approach for quality control;Funasaki;Quim. Nov.,2016
2. Alphaaromatics, Tonka Bean - the secret ingredient to many scented products, (n.d.). 〈https://www.alphaaromatics.com/blog/tonka-bean-and-scented-products〉 (accessed July 19, 2021).
3. L’Occitane au Brésil, (n.d.). 〈https://m.loccitaneaubresil.com/pt-br/p/deo-colonia-cumaru/BROBVS100074.html〉 (accessed July 19, 2021).
4. Natura, (n.d.). 〈https://www.naturabrasil.fr/en-us/fragrances/dual-eau-de-parfum-ilÍa-50ml-50292163〉 (accessed July 19, 2021).
5. HPLC analysis of tonka bean extracts;Ehlers;Z. Lebensm. Unters. Forsch.,1995