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Ahmed, S. , Ibrahiem, E. , Mesalhy, O. , Abdelatief, M.. "Study of Cross Flow Air-Cooling Process via Water-Cooled Wing-Shaped Tubes in Staggered Arrangement at Different Angles of Attack, Part 2: Heat Transfer Characteristics and Thermal Performance Criteria". World Academy of Science, Engineering and Technology, Open Science Index 78, International Journal of Aerospace and Mechanical Engineering (2013), 7(6), 1275 - 1288.