Genetic Programming 21st European Conference, EuroGP 2018, Parma, Italy, April 4-6, 2018, Proceedings - Castelli, Mauro; Castelli, Mauro; Sekanina, Lukas; Sekanina, Lukas; Zhang, Mengjie; Zhang, Mengjie; Cagnoni, Stefano; Cagnoni, Stefano; García-Sánchez, Pablo; García-Sánchez, Pablo (Springer International Publishing : Imprint: Springer, 2018)