From e51d24e2ecd5f7694a47882afb6e2e2c75aefff4 Mon Sep 17 00:00:00 2001
From: spirkelmann <simon.pirkelmann@gmail.com>
Date: Thu, 12 Sep 2019 08:33:42 +0200
Subject: [PATCH] collection of references

---
 references.txt | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 references.txt

diff --git a/references.txt b/references.txt
new file mode 100644
index 0000000..7aff286
--- /dev/null
+++ b/references.txt
@@ -0,0 +1,7 @@
+https://en.wikipedia.org/wiki/Circle_packing_in_a_circle
+
+https://geargenerator.com/
+
+http://hessmer.org/gears/InvoluteSpurGearBuilder.html
+
+https://forum.linuxcnc.org/31-cad-cam/36773-freecad-gear-modeling-and-design