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(n.d.). https://www.scientificamerican.com/blog/not-bad-science/2013/05/28/why-do-dogs-yawn-when-they-see-sleepy-humans/
Plus d’infosAtsushi Senju, Yukiko Kikuchi, Hironori Akechi, Toshikazu Hasegawa, Yoshikuni Tojo, Hiroo Osanai (2009). Brief Report: Does Eye Contact Induce Contagious Yawning in Children with Autism Spectrum Disorder?. Journal of Autism and Developmental Disorders, 39(11), 1598-1602. Springer Science and Business Media LLC.
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