Giguere, C., Moore, C., Whitehead, J. C., (2018). Working Paper - Department of Economics, Appalachian State University(No.18-07), 49 pp. Appalachian State University, Boone, USA. English language
Huth, W. L., McEvoy, D. M., Morgan, O. A., (2016). Working Paper - Department of Economics, Appalachian State University(No.16-05), 16 pp. Appalachian State University, Boone, USA. English language