http://www.valueyournetwork.com/wp-content/themes/Total/js/plugins/retina.js
http://codeslab.net/js/retina.js
http://static.mindlabpro.com/skin/frontend/mindlab/default/js/retina.js
http://www.nathangracerealestate.com/template/nathangrace/revolution/js/retina.min.js?ver=false
http://margxt.fr/wp-content/themes/cool/js/retina.js