eja: update the TODO list.

diff --git a/mjo/eja/TODO b/mjo/eja/TODO
index 7285d4aae1c90713348bfbc7126e78d67958944c..fcba1c0ea2e38a6e4dc9dbb8ba7c860179c08c20 100644 (file)
--- a/mjo/eja/TODO
+++ b/mjo/eja/TODO
@@ -1,3 +1,5 @@
 1. Add CartesianProductEJA.
 
 2. Check the axioms in the constructor when check != False?
+
+3. Add references and start citing them.