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
Grubb NR, Sutherland GR, Fleming A, Campanella C, Fox KAA, Sinclair C. Doppler tissue imaging for non-invasive optimisation of graft functions after dynamic cardiomyoplasty. Poster presented at the Medical Research Society Communications Meeting; April 13, 1994. [abstract] Clin Sci (Lond). 1994 Dec 1; 87(s31):38. doi: 10.1042/cs045038P_pt2