Papers are available through Moshe Sipper's website.
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maze: The code accompanying the paper, M. Sipper, J. H. Moore, and R. J. Urbanowicz, "Solution and fitness evolution (SAFE): Coevolving solutions and their objective functions", in Genetic Programming - 22nd European Conference, EuroGP 2019, L. Sekanina et al. Eds, 2019. -
multiobj: The code accompanying the paper, M. Sipper, J. H. Moore, and R. J. Urbanowicz, "Solution and Fitness Evolution (SAFE): A Study of Multiobjective Problems", in Proceedings of 2019 IEEE Congress On Evolutionary Computation, 2019.