Margulis AV, Houben E, Hallas J, Overbeek JA, Pottegard A, Torp-Pedersen T, Perez-Gutthann S, Arana A. Ophthalmic nepafenac use in the Netherlands and Denmark. Acta Ophthalmol. 2017 Aug;95(5):509-17. doi: 10.1111/aos.13468
Cassingham KM, Sills EO, Pattanayak SK, Mansfield CA. Voluntary conservation of North Carolina's natural heritage. J For. 2002;100(5):16-23.
Mansfield CA. A consistent method for calibrating contingent value survey data. South Econ J. 1998;64(3):665-81.