@article{JGG_2003_7_2_JGG_2003_7_2_a10,
     author = {A. Ruzyczka},
     title = {Spatial {Imagination} {Among} {Students} {Commencing} the {Course} of {Descriptive} {Geometry} at {Technical} {Studies}},
     journal = {Journal for geometry and graphics},
     pages = {247--252},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/JGG_2003_7_2_JGG_2003_7_2_a10/}
}