Stefanek, Jan MPI for Psychological Research (Munich, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Schneider, W., & Stefanek, J. (2004). Developmental changes of general cognitive abilities and school related skills in children and adolescents: Evidence of a widening gap. Zeitschrift für Entwicklungspsychologie und Pädagogische Psychologie, 36(3), 147-159.