Lincourt W, Stanford RH, Gilsenan A, DiBenedetti D, Ortega H. Assessing primary care physician`s beliefs and attitudes of asthma exacerbation treatment and follow-up. Open Respir Med J. 2010 Feb 22;4:9-14.
Phanikumar CV, Maitra B. Modeling willingness-to-pay values for rural bus attributes under different trip purposes. JTRF. 2006;45(2):31-44. doi: 10.22004/ag.econ.206787
Hartman M, Bolton E, Fehnel SE. Accounting for age differences on the Wisconsin Card Sorting Test: decreased working memory, not inflexibility. Psychol Aging. 2001 Sep 1;16(3):385-99.