References
- Barnes, J., & Thomas, M. (2001). U.S. Patent Application No. 09/893,240.
- LaGrave, K. (2016, February 16). How to get through airport customs as quickly as possible. Retrieved March 4, 2016, from http://www.cntraveler.com/stories/2016-02-16/how-to-get-through-airport-customs-as-quickly-as-possible
- Roberts, B., McGonegal, S., Prager, F., Wei, D., Rose, A. Z., Baschnagel, C., ... Baghelai, O. (2014). Analysis of primary inspection wait time at US ports of entry. Retrieved March 4, 2016, from http://research.create.usc.edu/cgi/viewcontent.cgi?article=1184&context=nonpublished_reports
- Timothy, D. J., & Tosun, C. (2003). Tourists’ perceptions of the Canada–USA border as a barrier to tourism at the International Peace Garden. Tourism Management, 24, 411–421. 10.1016/S0261-5177(02)00113-9
- Wasem, R. E., Lake, J., Seghetti, L., Monke, J., & Viña, S. (2004, May). Border security: Inspections practices, policies, and issues. Library of Congress Washington, DC: Congressional Research Service.