Lütke, Nikolay and Lange-Kuettner, Christiane (2015) Keeping it in three dimensions: measuring the development of mental rotation in children with the rotated colour cube test (RCCT). International Journal of Developmental Science, 9 (2). pp. 95-114. ISSN 2192-001X
Lütke, Nikolay (2020) The coloured cube test and the coloured mental rotation test: two new measures of spatial ability and mental rotation. Doctoral thesis, London Metropolitan University.