http://www.esri.com/components/responsive/css/centurion-grid-ie.min.css
https://www.esri.de/components/responsive/css/centurion-grid-ie.min.css
http://www.sigsa.info/components/responsive/css/centurion-grid-ie.min.css
http://www.esriuk.com/components/responsive/css/centurion-grid-ie.min.css