Bräuer, Juliane Linguistic and Cultural Evolution, Max Planck Institute for the Science of Human History, Max Planck Society;
https://www.psychologytoday.com/intl/blog/smarter-you-think/202009/do-dogs-feel-jealousy-or-guilt?fbclid=IwAR2uqyVvXbZzE9O00CetQAIJ5aEqDAaVkunQvS6_lz21cNmma_Web5s6anw (Publisher version)
Bräuer, J. (2020). Do dogs feel jealousy or guilt?: why the long face? Psychology today, 202009.