@article{
vanBab:09-009,
author={J.M. van Ast and R. Babu{\v{s}}ka and B. {D}e Schutter},
title={Novel ant colony optimization approach to optimal control},
journal={International Journal of Intelligent Computing and Cybernetics},
volume={2},
number={3},
pages={414--434},
year={2009},
doi={
10.1108/17563780910982671}
}