1 Bakar, Faima. "Premature Twins Hug after Meeting for the First Time Outside the Womb." Metro News. March 10, 2019. Accessed: January 31, 2022.
2 Cirino, Erica. "Why You Should Get (and Give) More Hugs." Healthline. April 11, 2018. Accessed: January 31, 2022.
3 De Waal, Frans. Mama's Last Hug: Animal Emotions and What They Tell Us about Ourselves. New York: W. W. Norton & Company, 2019.
4 Foussianes, Chloe. "Queen Elizabeth Was Happy to Hug Michelle Obama, and to Show 'Affection and Respect' for Her." Town and Country Magazine, November 2, 2019. Accessed: January 31, 2022.
5 Sylvester, David Hale. One Hug at a Time: 99 Stories from the Man Who Embraced the World. Self-Publication, 2021.
6 Walters, Randy. Hamburgers, Hot Dogs, and Hugs. The United States of America: Me Youniversity Publishing, 2021.