Smith VK, Evans MF, Banzhaf HS, Poulos C. Can weak substitution be rehabilitated? Environ Resour Econ (Dordr). 2010 Feb 1;45(2):203-21.
Mansfield CA. Despairing over disparities: an empirical analysis of the relationship between willingness-to-pay and willingness-to-accept. Environ Resour Econ (Dordr). 1999;13(2):219-34.
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