Edwards PET, Parsons GR, Myers KH. The economic value of viewing migratory shorebirds on the Delaware Bay: an application of the single-site travel cost model using on-site data. Hum Dimens Wildl. 2011;16(6):435-44. doi: 10.1080/10871209.2011.608180
Beach RH, Poulos C, Pattanayak SK. Agricultural household response to avian influenza prevention and control policies. J Agr Appl Econ. 2007 Aug 1;39(2):301-11.
Rousu MC, Monchuk DC, Shogren JF, Kosa KM. Consumer willingness to pay for “second generation” genetically engineered products and the role of market information. J Agr Appl Econ. 2005 Dec;37(3):647-57. doi: 10.1017/S1074070800027140