@article{ZuRaschka2020LookingBack,
title = {Rank consistent ordinal regression for neural networks with application to age estimation},
         journal = {Pattern Recognition Letters",
         volume = {140},
         pages = {325 - 331},
         year = {2020},
         issn = {0167-8655},
         doi = {https://doi.org/10.1016/j.patrec.2020.11.008},
         url = {http://www.sciencedirect.com/science/article/pii/S016786552030413X},
         author = {Wenzhi Cao and Vahid Mirjalili and Sebastian Raschka},
         publisher={Elsevier}
}