Coreference in Universal Dependencies (CorefUD) is an initiative to collect coreference corpora in various languages and harmonize them to the same scheme and data format (CoNLL-U).
CorefUD 0.2, the current version of the collection, can be downloaded from http://hdl.handle.net/11234/1-4598.
The next version, CorefUD 1.0, is in the process of releasing at LINDAT/CLARIAH-CZ. Meanwhile you can download it from here.
If you want to learn more about the collection, please have a look at