Institution: | (1) Ellinogermaniki Agogi, D. Panagea str, 15351 Pallini, Attica, Greece;(2) Centre of Maths & Science Education (Z-MNU), University of Bayreuth, University Campus, NW-1, 95447 Bayreuth, Germany;(3) Physics Department, University of Crete, 71003 Heraklion, Crete, Greece |