[O] Referencing TODO items

[Paulo Matos]

Hi,

I have a TODO item that got stuck due to some unforseen circumstances.
Another TODO item is needed as a workaround therefore I have something like:

* TODO Implement using hash tables
  :LOGBOOK:
  - Note taken on ... \\
  Stuck because...
  :END:

* TODO Implement using hand written maps
  This is required because todo item REF was stuck. If unstuck, we can
remove this implementation.

How can I REF the first TODO item in the second?

Thanks,

-- 
Paulo Matos