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The VLDB Journal > 2016 > 25 > 6 > 741-765
2016 IEEE World Congress on Services (SERVICES) > 142 - 143
Artificial Intelligence > 2016 > 234 > C > 78-119
Knowledge and Information Systems > 2017 > 50 > 1 > 167-195
Lecture Notes in Computer Science > AI '88 > 177-186
Lecture Notes in Computer Science > Intelligent Tutoring Systems > Collaborative and Group Learning 2 > 113-122