Any field of research and innovation must be exposed to revisions, criticisms and to an intense scrutiny not only to discuss the state of the art but, hopefully, to identify prospective changes and new areas of study and exploration as well.
Armella, Luis Moreno and Santos-Trigo, Manuel
"Introduction to International Perspectives on Problem Solving Research in Mathematics Education,"
The Mathematics Enthusiast: Vol. 10
, Article 2.
Available at: http://scholarworks.umt.edu/tme/vol10/iss1/2