3Colorni A, Dorigo M. , Maniezzo V. Distrbuted optimization by ant colonies [ C ], Proc. of the First European Conference on Artificial Life. Paris, France : Elsevier Publishing, 1991 : 134 - 142.
4Colorni A, Dorigo M. , Maniezzo V. An investigation of some properties of an ant algorithm[ C]. Pro. of the Parallel Problem Solving from Nature Conference ( PPSN' 92 ), Brussels, Belgium: Elsevier Publishing, 1992 : 509 - 520.
5Dorigo M, Maniezzo V, Colorni. A Ant system : optimization by a colony of cooperating agents [ J ]: IEEE Trans. On SMC, 1996,26( 1 ) :29 -41.
