MULLEY, Corinne; GEBEL, Klaus a DING, Ding. Walking: connecting sustainable transport with health. Transport and Sustainability. Bingley, United Kingdom: Emerald Publishing Limited, 2017. ISBN 9781787146273. Dostupné také z: https://proxy.k.utb.cz/login?url=http://www.emeraldinsight.com/doi/book/10.1108/S2044-994120179.