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- [13] U.S., Europe struggle for competitive advantage Aviation Week and Space Technology (New York), 1997, 146 (24):
- [14] Europe will catch up to U.S. [6] Aviation Week and Space Technology (New York), 2003, 158 (24):
- [17] U.S., Europe poised for airline profits Aviation Week and Space Technology (New York), 1994, 140 (22):
- [18] Opportunities and challenges for U.S. Telcos in Europe NTQ (New Telecom Quarterly), 1994, 2 (02):