Laguna-Sánchez, G. A., Olguí­n-Carbajal, M., Cruz-Cortés, N., Barrón-Fernández, R. and Álvarez-Cedillo, J. A. (2009) “Comparative Study of Parallel Variants for a Particle Swarm Optimization”, Journal of Applied Research and Technology, 7(03). doi: 10.22201/icat.16656423.2009.7.03.489.