Mark Graham just reported that the hewiki* files from the "citations with identifiers" dataset [1] are empty. This looks like a parsing error, given that there are definitely DOIs and ISBNs in Hebrew Wikipedia. Filing a bug if we have bandwidth to look into this.
cc @Miriam and @bmansurov
[1] https://analytics.wikimedia.org/datasets/archive/public-datasets/all/mwrefs/mwcites-20180301/