* [http://www.dutchcycling.nl/library/file/Bicycle%20inclusive%20planning%20and%20design%20ThinkBike%20Helsinki.pdf Sustainable safety - Bicycle inclusive planning and design], Arnold Bongers and Dick van Venn, שגרירות האופניים ההולנדית | * [http://www.dutchcycling.nl/library/file/Bicycle%20inclusive%20planning%20and%20design%20ThinkBike%20Helsinki.pdf Sustainable safety - Bicycle inclusive planning and design], Arnold Bongers and Dick van Venn, שגרירות האופניים ההולנדית |