1. Independent mobility and children's physical development;Armstrong,1993
2. Children's spatial representation of their neighbourhood: A step towards a general spatial competence;Biel;Journal of Environmental Psychology,1983
3. Children's spatial representation of their neighbourhood: a step towards a general spatial competence;Biel;Journal of Environmental Psychology,1995
4. Portare i bambini in città. A scuola ci andiamo da soli;Boggi,2000
5. Why do parents drive their children to school?;Bradshaw;Traffic Engineering and Control,1995