@article{TM2_2010_XIII_2_a0,
     author = {Mar{\'\i}a Angeles Navarro and Pedro P\'erez Carreras},
     title = {Local rate of change: a {Socratic} experience in van {Hiele's} model framework},
     journal = {The Teaching of Mathematics},
     pages = {63 },
     year = {2010},
     volume = {XIII},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2010_XIII_2_a0/}
}