1. Azman Hashim International Business School, Universiti Teknologi Malaysia (UTM), Skudai Johor, 81310, Malaysia
2. Informetrics Research Group, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam
3. Faculty of Business Administration, Ton Duc Thang University, Ho Chi Minh City, Vietnam
4. Vilnius University, Kaunas Faculty, Muitines 8, Kaunas, Lithuania
5. College of Hospitality and Tourism Management, Sejong University, 98 Gunja-Dong, Gwanjin-Gu, Seoul 143-747, Korea