Finkelstein EA, Mansfield C, Wood D, Rowe B, Chay J, Ozdemir S. Trade-offs between civil liberties and national security: a discrete choice experiment. Contemp Econ Policy. 2017 Apr;35(2):292-311. doi: 10.1111/coep.12188
Roberts J, Price J, Nelson LM, Burchinal M, Hennon E, Barnes B. Receptive vocabulary, expressive vocabulary, and speech production of boys with fragile X syndrome in comparison to boys with Down syndrome. Am J Ment Retard. 2007 May 1;112:177-93.