Source: http://blog.themeforest.net/general/15-css-tricks-that-must-be-learned/ [4]
Links:
[1] http://pulse.veltsos.com/category/it/software/development
[2] http://pulse.veltsos.com/category/it/it-general
[3] http://linux.philosweb.com/drupal5/files/image_2_53.png
[4] http://blog.themeforest.net/general/15-css-tricks-that-must-be-learned/