<p>I originally had that near the top but in one of the rewrites I moved the papers to the end — <a href="https:&#x2F;&#x2F;www.redblobgames.com&#x2F;articles&#x2F;sdf-fonts&#x2F;#appendix" rel="nofollow">https:&#x2F;&#x2F;www.redblobgames.com&#x2F;articles&#x2F;sdf-fonts&#x2F;#appendix</a>

<p>Valve originally devised this technique in 2007:<p><a href="https:&#x2F;&#x2F;steamcdn-a.akamaihd.net&#x2F;apps&#x2F;valve&#x2F;2007&#x2F;SIGGRAPH2007_AlphaTestedMagnification.pdf" rel="nofollow">https:&#x2F;&#x2F;steamcdn-a.akamaihd.net&#x2F;apps&#x2F;valve&#x2F;2007&#x2F;SIGGRAPH2007...</a>

<p>The article in question, <a href="https:&#x2F;&#x2F;www.redblobgames.com&#x2F;articles&#x2F;sdf-fonts&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.redblobgames.com&#x2F;articles&#x2F;sdf-fonts&#x2F;</a> is really neat as well, especially the interactive demonstrations

Writing a Guide to SDF Fonts