G. Nobrega, V. Tasso, A. Souza, S. Fernandez, and D. Silva.
" Artificial Immune Systems for Solving the Uncapacitated Single-Allocation p-Hub Median Problem", in Anais do XV Encontro Nacional de Inteligência Artificial e Computacional, São Paulo, 2018, pp. 632-643, doi: https://doi.org/10.5753/eniac.2018.4454.