a person in the record
Catholijn Jonker
Dutch university teacherborn 1967
Wikidata names Dirk van Dalen and Jan van Leeuwen as doctoral advisors and lists 2 doctoral students. Linked to Wikidata, ORCID, and 8 other registers.

How to read the markscited by a repository's recordstated by Wikidata or indexed by OpenAlexclaimed on an ORCID list, or inferred
Advisors on Wikidata2
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
- stated by Wikidata
Students on Wikidata2
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
- stated by Wikidata
The line above and below4 steps
The advisors of their advisors, four steps up at most, in the thesis records and on Wikidata, each kind marked; a person in both is listed once.
- 1 step up
stated by WikidataDirk van Dalenstated by WikidataJan van Leeuwen
- 2 steps up
stated by WikidataArend Heyting
- 3 steps up
stated by WikidataLuitzen Egbertus Jan Brouwer
- 4 steps up
stated by WikidataDiederik Korteweg
Below them, within 3 steps, the record reaches 3 people: 3 stated by Wikidata.
Education and career15
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- 1985 to 1990studied
- 1990 to 1994studied
- 1990 to 1994worked
- 1993 to 1994worked
- 1994 to 1995worked
- 1995 to 2004
- 2000 to 2001
- 2004 to 2006worked
- 2004 to 2004
- from 2006
- 2011 to 2013worked
- 2014 to 2015
- 2016 to 2016worked
- undatedstudied
- undatedworked