Wardman M, Chintakayala PK, de Jong G. Values of travel time in Europe: review and meta-analysis. Transp Res Part A Policy Pract. 2016 Dec;94:93-111. doi: 10.1016/j.tra.2016.08.019
Kosa KM, Cates SC, Ball M, Godwin SL, Coppings RJ. Consumers' response and preparedness to ensure food safety during extended power outages: findings from a national survey. International journal of food safety, nutrition and public health. 2014 Jul 17;5(1):34-45. doi: 10.1504/IJFSNPH.2014.063503