Erkki Pehkonen · 8 obras en el catálogoObrasBeliefsGGeometry teachingGeometry teachingPosing and Solving Mathematical ProblemsHow Finns learn mathematics and sciencePProblem Solving in Mathematics EducationProblem Solving in Mathematics EducationEEin hypoelliptisches DirichletproblemEin hypoelliptisches DirichletproblemPProblem fields in mathematics teachingProblem fields in mathematics teachingRegularität der schwachen Lösungen linearer quasielliptischer Dirichletprobleme