RelBib: Results for "(11853856x OR 11853453x)"
https://relbib.de/search/results?filter[]=~language:"English"&filter[]=~language:"Norwegian"&filter[]=~relbib_notation_facet:"NBE"&filter[]=~relbib_notation_facet:"VA"&lookfor=(11853856x OR 11853453x)&type=AllFields