• Why it makes sense to bike without a helmet http://www.howiechong.com/journal/2014/2/bike-helmets#.U9hcx4BdUeP 88 comments 30/7/2014
• Why it makes sense to bike without a helmet http://www.howiechong.com/journal/2014/2/bike-helmets 3 comments 30/4/2014

• [eng] riflessioni sul perché non indossare un casco in bicicletta in città http://www.howiechong.com/journal/2014/2/bike-helmets 36 comments 18/8/2016 italy