[1] Andrade, M., Montecino, A.: La problemática de la tridimensionalidad y su representación en el plano. (2011). In: XIII Conferencia Interamericana de Educación Matemática, (1–10). Recife, Brasil.
[2] Battista, M. T.: 
Spatial Visualization and gender differences in high school geometry. (1990). Journal for Research in Mathematics Education, 21, 47-60. 
DOI 10.2307/749456 
[3] Linn, M. C., Petersen, A. C.: 
Emergence and characterization of gender differences in spatial ability: A meta-analysis. (1985). Child development, 56, 1479-1498. 
DOI 10.2307/1130467 
[4] Makina, A.: The role of visualisation in developing critical thinking in mathematics. (2010). Perspectives in Education, 28(1), 24-33.
[5] McGee, M. G.: 
Human spatial abilities: psychometric studies and enviroment, genetic, hormonal and neurological influences. (1979). Psychological bulletin, 86, 889-918. 
DOI 10.1037/0033-2909.86.5.889 
[6] Piaget, J., Inhelder, B., Szeminska, A.: 
Human spatial abilities: psychometric studies and enviroment, genetic, hormonal and neurological influences. (1960). The child conception of geometry.  London: Routledge & Kegan.  
MR 0112797 
[7] Presmeg, N. C.: Visualization in high school mathematics. (1986). For the Learning of Mathematics, 6(3), 42-46.
[8] Vágová, R.: Problém vrstvenia kociek - vizualizácia "neviditeľných" objektov. (2018). In: Študentská vedecká konferencia 2018 (494-501). Banská Bystrica: UMB.