Gutiérrez, P. A.; Pérez-Ortiz, M.; Sánchez-Monedero, J.; Fernández-Navarro, F.; Hervás-Martínez, C. (January 2016). "Ordinal Regression Methods: Survey and Experimental Study". IEEE Transactions on Knowledge and Data Engineering. 28 (1): 127–146. doi:10.1109/TKDE.2015.2457911. hdl:10396/14494. ISSN1041-4347.
Christensen, Rune Haubo B. (2020-06-05), runehaubo/ordinal, retrieved 2020-07-15
handle.net
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Gutiérrez, P. A.; Pérez-Ortiz, M.; Sánchez-Monedero, J.; Fernández-Navarro, F.; Hervás-Martínez, C. (January 2016). "Ordinal Regression Methods: Survey and Experimental Study". IEEE Transactions on Knowledge and Data Engineering. 28 (1): 127–146. doi:10.1109/TKDE.2015.2457911. hdl:10396/14494. ISSN1041-4347.
Gutiérrez, P. A.; Pérez-Ortiz, M.; Sánchez-Monedero, J.; Fernández-Navarro, F.; Hervás-Martínez, C. (January 2016). "Ordinal Regression Methods: Survey and Experimental Study". IEEE Transactions on Knowledge and Data Engineering. 28 (1): 127–146. doi:10.1109/TKDE.2015.2457911. hdl:10396/14494. ISSN1041-4347.