Dundas SJ, von Haefen RH, Mansfield C. Recreation costs of endangered species protection: evidence from Cape Hatteras National Seashore. Marine Resource Economics. 2018 Jan;33(1):1-25. doi: 10.1086/694752
Fleming A, Olson JA, Sharp PF, Goatman KA, Philip S. Response to 'Improved automated screening of diabetic retinopathy' by Carlos M. Oliveira et al. Ophthalmologica. 2012 Jan 1;227(3):173. doi: 10.1159/000334922
Myers KH, Parsons GR, Edwards PET. Measuring the recreational use value of migratory shorebirds on the Delaware Bay. Marine Resource Economics. 2010 Apr 23;25(3):247-64.
Pueschel SM, Rothman KJ, Ogilby JD. Birth weight of children with down's syndrome. Am J Ment Defic. 1976 Jan;80(4):442-5.