Lucas A, Wilson M, Sings HL, Pugh S, Jones D, Farkouh R, Gessner B, Wasserman M. Estimating the vaccine effectiveness against serotype 3 for the 13-valent pneumococcal conjugate vaccine: a dynamic modeling approach. International journal of infectious diseases and therapy. 2019 Dec;4(4):56-66. doi: 10.11648/j.ijidt.20190404.12
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.