Javascript
www.w3schools.com/js/js_conventions.asp
http://lab.abhinayrathore.com/jquery-standards/
JavaScripts exercices http://js.odusseus.org
cercle
http://www.mathopenref.com/coordcirclealgorithm.html
http://fileshare.cqproject.net/files//jsfkids.pdf
http://blog.xebia.fr/2013/06/10/javascript-retour-aux-bases-constructeur-prototype-et-heritage/
https://laracasts.com/series/learn-vue-2-step-by-step/episodes/1?autoplay=true