Smoother & sharper shadows with layered box-shadows | Tobias Ahlin
CSS box-shadow property with 9 Solid Examples
A Collection Of Cross-browser CSS Box Shadows - Box-shadows.css | CSS Script
Haz ar Twitter: "Here's a nice trick to create drop shadows on containers with overflow elements like arrows. Instead of using the CSS box-shadow property, you can use: filter: drop-shadow(0 3px 3px