Stan Lee: http://blog.oup.com/2013/11/stan-lee-on-what-is-a-superhero
first superheroes:
* Gilgamesh: http://en.wikipedia.org/wiki/Gilgamesh
* Samson: http://en.wikipedia.org/wiki/Samson
psychologists’ point of view: http://www.theatlantic.com/entertainment/archive/2013/07/why-do-people-like-superheroes-dont-ask-a-psychologist/277608/
http://www.psychologytoday.com/blog/the-superheroes
superheroes and cinema: http://thinkprogress.org/alyssa/2013/11/06/2893031/superheroes-film-marvel
academics’ point of view: