Organizer:
<div ng:repeat="organizer in registration.symposium.organizers">
-[<a href="" ng:click="registration.symposium.organizer.$remove(author)">X</a>]
+[<a href="" ng:click="registration.symposium.organizers.$remove(author)">X</a>]
<input name="organizer.name" ng:required>
<input name="organizer.surname" ng:required>
<input name="organizer.inst" >
<input name="organizer.email" ng:required>
</div>
-[<a href="" ng:click="registration.symposium.organizer.$add()">Add another organizer</a>]
+[<a href="" ng:click="registration.symposium.organizers.$add()">Add another organizer</a>]
</div>
<hr>