Similarity “Obstacles in Constructing Geometrical Proofs of Mathematics-Teacher-Students Based on Boero’s Proving Model”
http://repository.uhamka.ac.id/840/
http://repository.uhamka.ac.id/840/1/Learning%20Geometry%20Obstacle.pdf
http://repository.uhamka.ac.id/840/
http://repository.uhamka.ac.id/840/1/Learning%20Geometry%20Obstacle.pdf