An Ant Colony Approach For The Steiner Tree Problem. - Sanjoy Das; Shekhar V. Gosavi; William H. Hsu; Shilpa A. Vaze (GECCO, 2002)

An Ant Colony Algorithm for Steiner Trees: New Results. - Sanjoy Das; Shekhar V. Gosavi; William H. Hsu; Shilpa A. Vaze (GECCO Late Breaking Papers, 2002)

Obtaining subtrees from graphs: an ant colony approach. - Shekhar V. Gosavi; Sanjoy Das; Shilpa A. Vaze; Gurdip Singh; Erik C. Buehler (SIS, 2003)