diff --git a/doc-src/markdown2html.sh b/doc-src/markdown2html.sh
index f7149cd..c27c77f 100755
--- a/doc-src/markdown2html.sh
+++ b/doc-src/markdown2html.sh
@@ -11,7 +11,7 @@ cat <$2
-
+
EOF
diff --git a/references.md b/references.md
index 8babc10..7ece7dd 100644
--- a/references.md
+++ b/references.md
@@ -20,7 +20,7 @@
* [](https://imgur.com/a/OhRd4)
* [The best mechanical keycaps](https://blog.wooting.nl/what-are-the-best-mechanical-keyboard-keycaps), a presentation of various properties of keycaps
* [](https://deskthority.net/viewtopic.php?p=80654#p80654)
-* Planck [](https://i.imgur.com/cNipMSc.png)
+* Planck keyboards have only four rows. The first row is usually activated with the thumbs, and all other keys are at most 1 key away from the home row. [](https://i.imgur.com/cNipMSc.png)
* [WASD Keyboards](https://www.wasdkeyboards.com/) does full-color print on keycaps. Examples:
[](https://i.imgur.com/F3lgqHJ.jpg)
[](https://wasdkeyboards.tumblr.com/image/120541521288)