On keys' meanings and modes: the impact of different key solutions on children's efficiency using a mobile phone.

Martina Ziefle Susanne Bay Alexander Schwade On keys' meanings and modes: the impact of different key solutions on children's efficiency using a mobile phone. 413-431 2006 25 Behaviour & IT 5 http://dx.doi.org/10.1080/01449290500197086 db/journals/behaviourIT/behaviourIT25.html#ZiefleBS06