Tricks to Cut Corners Using CSS Mask and Clip-Path Properties | CSS-Tricks - CSS-Tricks
CSS Border Corner Shape: Scoop, Notch, Square-Cut - Lena Design
CSS Borders: The Basics And Rounded Corners - Vanseo Design
CSS Border Corner Shape
Expanded Use of `box-shadow` and `border-radius` | Modern CSS Solutions
CSS border-radius property - javatpoint
css - How can I show only corner borders? - Stack Overflow
border-corner-shape is in danger, and you can help! – Lea Verou
EsCss: border-corner-shape: border-radius cóncavos y rectilíneos. Por @Kseso
Understanding Clip Path in CSS - Ahmad Shadeed
html - Border corner shape scoop doesn't work - Stack Overflow
CSS shape
CSS border-radius can do that? | CSS-Tricks - CSS-Tricks
border-corner-shape is in danger, and you can help! – Lea Verou
Re: Idea : replacement for border-radius, a more complete corner styling property. from Andrew Fedoniouk on 2011-09-01 (www-style@w3.org from September 2011)
css - How can I show only corner borders? - Stack Overflow