a person in the record
Bret Kragel
Ph.D. Universität Trier 2005
Wikidata names Ekkehard Sachs and John Allen Burns as doctoral advisors. Linked to Wikidata.
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
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 WikidataEkkehard Sachsstated by WikidataJohn Allen Burns
- 2 steps up
stated by WikidataWerner Krabsstated by WikidataWilliam Thomas Reid
- 3 steps up
stated by WikidataHyman Joseph Ettlingerstated by WikidataLothar Collatz
- 4 steps up
stated by WikidataAlfred Klosestated by WikidataErhard Schmidtstated by WikidataGeorge David Birkhoff
Education and career1
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- undatedstudied