%0 Journal Article %T Contributions, Scope and Limitations of the Problem-Solving Approaches of George Pólya, Alan H. Schoenfeld and Frederick Reif in Mathematics Learning %U http://hdl.handle.net/10584/12372 %K learning mathematics %K problem solving %K metacognitive processe %K aprendizaje de las matemáticas %K rresolución de problemas %K procesos metacognitivos %~ GOEDOC, SUB GOETTINGEN