* 46 pages, 25 figures. IEEE Transactions on Knowledge and Data
Engineering, accepted in October, 2018. arXiv admin note: substantial text
overlap with arXiv:1704.04966 Access Paper or Ask Questions
* 16 pages, 5 figures, Appears in Proceedings of the 31th AAAI
Conference on Artificial Intelligence (AAAI), San Francisco, California, USA,
pp. 2287--2293, 2017 Access Paper or Ask Questions
* 16 pages, 5 figures, Appears in Proceedings of the 30th AAAI
Conference on Artificial Intelligence (AAAI), Phoenix, Arizona, USA, pp.
2016--2022, 2016 Access Paper or Ask Questions