1. The curious case of the Danish mask study;British Medical Journal,2020
2. Capper, C.
(2014). Individualism in Ralph Waldo Emerson's “self-reliance”. America in Class. National Humanities Center. Retrieved from https://americainclass.org/individualism-in-ralph-waldo-emersons-self-reliance/. Accessed on March 28, 2021.
3. Chaniotis, A.
(2020). Ancient plagues and covid-19: Is history repeating itself? An interview with Joanne Lipman. Retrieved from https://www.ias.edu/ideas/chaniotis-ancient-plagues-covid. Accessed on November 7, 2021.