http://www.biblio-scientifique.net/search/label/Physique%20generale
http://www.exercicegratuit.com/
http://www.ostralo.net/html_css/pages/p5a_couleurs.htm
http://www.la-grange.net/w3c/html4.01/cover.html
http://www.ostralo.net/html_css/pages/p5b_caracteres_speciaux.htm
http://www.science-et-vie.com/
http://www.futura-sciences.com/