Sun, M., Stam, A. <https://pure.iiasa.ac.at/view/iiasa/1588.html>, & Steuer, R.E.  (2000).  Interactive multiple objective programming using Tchebycheff programs and artificial neural networks.   Computers & Operations Research 27 (7-8) 601-620. 10.1016/S0305-0548(99)00108-2 <https://doi.org/10.1016/S0305-0548%2899%2900108-2>.