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Prototype selection to improve monotonic nearest neighbor, Cano, J. R., Aljohani Naif R., Abbasi Rabeeh Ayaz, Alowidbi Jalal S., and García S. , Engineering Applications of Artificial Intelligence, Volume 60, p.128 - 135, (2017)
Training set selection for monotonic ordinal classification, Cano, J. R., and García S. , Data & Knowledge Engineering, Volume 112, p.94 - 105, (2017)