numapde-get-bib.sh 1910.08892 --merge numapde.bib fails
It fails with
File "/home/roland/Work/public/numapde-bibliography/bin/numapde-merge-bibliography.py", line 47, in <module>
curDOI = entry.fields.get('DOI').upper()
AttributeError: 'NoneType' object has no attribute 'upper'