From 94571a7aecb6eabf80a8866814e9801158922ddd Mon Sep 17 00:00:00 2001
From: Markus Unterwaditzer <markus@unterwaditzer.net>
Date: Sun, 6 Apr 2014 14:17:34 +0200
Subject: [PATCH] Add reference to offlineimap blogpost

---
 vdirsyncer/sync.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/vdirsyncer/sync.py b/vdirsyncer/sync.py
index f58c375..f10587b 100644
--- a/vdirsyncer/sync.py
+++ b/vdirsyncer/sync.py
@@ -9,6 +9,9 @@
     type. This allows us not only to synchronize a local vdir with a CalDAV
     server, but also synchronize two CalDAV servers or two local vdirs.
 
+    The algorithm is based on the blogpost "How OfflineIMAP works" by Edward Z.
+    Yang. http://blog.ezyang.com/2012/08/how-offlineimap-works/
+
     :copyright: (c) 2014 Markus Unterwaditzer
     :license: MIT, see LICENSE for more details.
 '''