I have seen a photocopy of a translation of a Dutch article with drawings dealing with Ovis, Gazelle and perhaps Capra (I am not exactly sure, it might even be Dama?). I cannot remember who wrote the Dutch article but the (unofficial) translation was by Paul Halstead. I would have loved to send you a photocopy but my copy was stolen almost a year ago along with my laptop computer.
If Paul Halstead is on this list or the Dutch person who wrote the original article, it would be greatly appreciated to have the reference (or photocopy) as there are many people who work on the NE and who have to deal with this problem all the time.
Sorry to be so unhelpful, but hopefully someone will write with the correct answer!