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Aktualisierung Promotion
| homepage =http://www.math.lmu.de/~didaktik/index.php?ordner=sommerho&data=start
| homepage =http://www.math.lmu.de/~didaktik/index.php?ordner=sommerho&data=start
| dissertation =The Individual Cognitive Resources Underlying Students' Mathematical Argumentation and Proof Skills
| dissertation =The Individual Cognitive Resources Underlying Students' Mathematical Argumentation and Proof Skills
| promoviert =
| promoviert = ja
| email =sommerhoff@math.lmu.de
| email =sommerhoff@math.lmu.de
| MGP-ID =
| MGP-ID =