sass - Compass "box-shadow" mixin returns Invalid property value - Stack Overflow
The master guide to smooth, realistic shadows in CSS - DEV Community
Layered box-shadows via Sass mixin
css box shadow color on white background Code Example
Getting Deep Into Shadows | CSS-Tricks - CSS-Tricks
Battle of the LESS Mixin Libraries: LESS Elements vs. LESS Hat vs. Bootstrap | Design Shack
SCSS mixin to convert Photoshop drop shadows to CSS3 box-shadow
Error: no mixin named box-shadow · Issue #597 · thomaspark/bootswatch · GitHub
CSS Circle Border Radius Gradient Mixin Box Shadow - CSS CodeLab
SCSS Mixins | 5 awesome and creative examples | The Modern Web
mixin for `box-shadow` is missing · Issue #518 · thoughtbot/bourbon · GitHub
LESS CSS Pre-processor
Freebie: Google Material Design Shadow Helper | by Florian Kutschera | Medium
Undefined mixin 'box-shadow' · Issue #63 · ejholmes/active_admin_editor · GitHub
Getting Deep Into Shadows | CSS-Tricks - CSS-Tricks
An Introduction to CSS Preprocessing - Speaker Deck
CSS box-shadow support / sciter
An Introduction to CSS Preprocessing - Speaker Deck
Mario written in CSS? Successfully broke the box-shadow~ - Code World
5 Useful Sass Mixins - PSD2HTML Blog
material-shadow.scss
Powerful less mixins - Made Simple Media
How to Make Pixel Art With Box Shadows - Webtips
21 Great CSS Text Shadow Effect Examples - OnAirCode
