7Mokhtarian, Patricia L. Examine the Impacts of Residential Self- Selection on Travel Behavior: A Focus on Methodologies. A Tribute to the Career of Frank Koppel man, 2008, (3):204-228.
8Seohee Chang & Gibson, Heather J. Physically Active Leisure and Tourism Connection: Leisure Involvement and Choice of Tourism Activities among Paddlers. Leisure Sciences, 2011, 2(33): 162-181.