@misc {MATHEDUC.02455634,
    author       = {Baracs, J. and Pallascio, R.},
    title        = {The development of spatial perception. Entwicklung der Raumwahrnehmung(Le developpement de la perception spatiale).},
    howpublished = {Processes of geometrisation and visualization. Proceedings. Geometrie und Anschauung(Processus de geometrisation et de visualisation). Proceedings(Compte rendus). Editor(s): Pellerey, M. International Commission for the Study and Improvement of Mathematics Teaching nd . p. 37-49 of 360 p. With 8 figs. Mit 8 Abbildungen. Conference: 33. CIEAEM meeting on processes of geometrisation and visualization, Verbania Pallanza (Italy), 2-9 Aug 1981},
    msc2010      = {G42xx (C22xx)},
    identifier   = {1983e.00665},
}