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  1. Tsakonas, G.; Papatheodorou, C.: Exploring usefulness and usability in the evaluation of open access digital libraries (2008) 10.31 
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  2. Tsakonas, G.; Papatheodorou, C.: ¬An ontological representation of the digital library evaluation domain (2011) 10.31 
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  3. Tsakonas, G.; Mitrelis, A.; Papachristopoulos, L.; Papatheodorou, C.: ¬An exploration of the digital library evaluation literature based on an ontological representation (2013) 10.31 
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