Available online at www.sciencedirect.com
ScienceDirect Procedia - Social and Behavioral Sciences 106 (2013) 746 – 758
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1877-0428 © 2013 The Authors. Published by Elsevier Ltd. Selection and peer-review under responsibility of The Association of Science, Education and Technology-TASET, Sakarya Universitesi, Turkey. doi:10.1016/j.sbspro.2013.12.086
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