Satukitchai, T., and K. Jearanaitanakij. “An Early Exploratory Method to Avoid Local Minima in Ant Colony System”. ECTI Transactions on Computer and Information Technology (ECTI-CIT), vol. 10, no. 1, Apr. 2016, pp. 33-41, doi:10.37936/ecti-cit.2016101.56397.