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.
Hunt SM, McKenna SP, Doward LC. Preliminary report on the development of a disease-specific instrument for assessing quality of life of adults with growth hormone deficiency. Acta Endocrinol. 1993 Jun 1;128(Suppl 2):37-40.