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.
Palka P, Lange A, Wright RA, Starkey IR, Fleming AD, Bouki KP, Sutherland GR, Shaw TRD, Fox KAA. Myocardial velocity gradient measured throughout the cardiac cycle in dilated cardiomyopathy hearts — a potential new parameter of systolic and diastolic myocardial function by Doppler myocardial imaging. European journal of ultrasound. 1997 Jun 1;5(3):141-54. doi: 10.1016/S0929-8266(97)00014-1
Hoskins PR, Fleming A, Stonebridge PA, Allan PL, Cameron D. Scan-plane vector maps and secondary flow motions in arteries. European journal of ultrasound. 1994 Apr 1;1(2):159-69.