diff --git a/sdl/whatever/references b/sdl/whatever/references
new file mode 100644
index 0000000..1b29c38
--- /dev/null
+++ b/sdl/whatever/references
@@ -0,0 +1,4 @@
+http://www.xeekworx.com/sdl2guides/11-sdl2guides-02
+https://wiki.libsdl.org/CategoryAPI
+https://wiki.libsdl.org/MigrationGuide
+http://www.willusher.io/sdl2%20tutorials/2013/08/17/lesson-2-dont-put-everything-in-main