@article{PNA_2009_2009_1_a6,
     author = {Kilpatrick, Jeremy},
     title = {The {Mathematics} {Teacher} and {Curriculum} {Change.}},
     journal = {PNA},
     pages = {107-121},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PNA_2009_2009_1_a6/}
}