Mangel AW, Lothman K. Pulse synchronized contractions (PSCs): a call to action - Editorial. Open J Cardiol Heart Dis. 2018 Jan 29;1(2).
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