a person in the record
Stephan Lemkens
Doctoral advisors on Wikidata: Arie M. C. A. Koster and Eberhard Triesch.
Advisors on Wikidata
Wikidata's own statements of who supervised whom, kept apart from the record's theses and never counted with them.
Wikidata run graph-wikidata-20261008T220003Z