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IEEE Transactions on Learning Technologies > 2017 > 10 > 1 > 53 - 67
IEEE Access > 2017 > 5 > 2870 - 2879
IEEE Transactions on Fuzzy Systems > 2016 > 24 > 6 > 1525 - 1543
2011 IEEE International Systems Conference > 563 - 568
2008 International Conference Visualisation > 123 - 128