Vitorino Ramos Carlos Fernandes Agostinho C. Rosa Ajith Abraham Computational chemotaxis in ants and bacteria over dynamic environments. 1109-1117 2007 IEEE Congress on Evolutionary Computation http://dx.doi.org/10.1109/CEC.2007.4424594 conf/cec/2007 db/conf/cec/cec2007.html#RamosFRA07