The future outlook for Portuguese travel agents / A. George Assaf, Carlos Pestana Barros, Luiz Pinto Machado
European vs. U.S. airlines: Performance comparison in a dynamic market / A. George Assaf, Alexander Josiassen
Benchmarking international tourism destinations / A. George Assaf, Larry Dwyer
The estimation and decomposition of tourism productivity / A. George Assaf and Mike Tsionas