Dirk Janssens

Almost contact structures and curvature tensors

Dirk Janssens, L. Vanhecke · Kodai Mathematical Journal · 1981 · 267 citations

Global Geometry, Contact Metric Manifolds, Representation Theory +8

Not Everything Is Proportional: Effects of Age and Problem Type on Propensities for Overgeneralization

Wim Van Dooren, Dirk De Bock, An Hessels et al. · Cognition and Instruction · 2005 · 179 citations

Aging, Ageism, Education +17

Teachers' content and pedagogical content knowledge on rational numbers: A comparison of prospective elementary and lower secondary school teachers

Fien Depaepe, Joke Torbeyns, Nathalie Vermeersch et al. · Teaching and Teacher Education · 2015 · 146 citations

Teacher Education, Mathematics Education, Prospective Elementary +9

Improper use of linear reasoning: An in-depth study of the nature and the irresistibility of secondary school students' errors

Dirk De Bock, Wim Van Dooren, Dirk Janssens et al. · Educational Studies in Mathematics · 2002 · 136 citations

Formalizing refactorings with graph transformations

Tom Mens, Niels Van Eetvelde, Serge Demeyer et al. · Journal of Software Maintenance and Evolution Research and Practice · 2005 · 132 citations