Children's active travel and independent mobility in four countries: Development, social contributing trends and measures
Fyhri, Aslak ; Hjorthol, Randi ; Mackett, Roger L. ; Fotel, Trine Nordgaard ; Kyttä, Marketta
Transport policy, 2011-09, Vol.18 (5), p.703-710 [Periódico revisado por pares]Elsevier Ltd
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