@article{JGG_2008_12_1_JGG_2008_12_1_a9,
     author = {R. Duarte Seabra and E. Toledo Santos },
     title = {Evaluation of the {Spatial} {Visualization} {Ability} of {Entering} {Students} in a {Brazilian} {Engineering} {Course}},
     journal = {Journal for geometry and graphics},
     pages = {99--108},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2008},
     url = {http://geodesic.mathdoc.fr/item/JGG_2008_12_1_JGG_2008_12_1_a9/}
}