Wang, X., J. Ying, J. V. de M. Cardoso, and D. P. Palomar. “Efficient Algorithms for General Isotone Optimization”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 36, no. 8, June 2022, pp. 8575-83, doi:10.1609/aaai.v36i8.20835.