NĚMEC, Jiří and Josef TRNA. Edutainment or Entertainment. Education Possibilities of Didactic Games in Science Education. In
Němec, J. (ed.) THE EVOLUTION OF CHILDREN PLAY - 24. ICCP Word Play Conference. Brno: Pedagogická fakulta, Masarykova univerzita, Brno, 2007, p. 55-64. ISBN 978-80-210-4666-5.