Experimental assessment of the effectiveness of synthetic personae for multi-modal e-retail applications. - Helen McBreen; Paul Shade; Mervyn A. Jack; Peter J. Wyard (Agents, 2000)

Evaluating humanoid synthetic agents in e-retail applications. - Helen McBreen; Mervyn A. Jack (IEEE Trans. Syst. Man Cybern. Part A, 2001)

Embodied conversational agents : extending the persona metaphor to virtual retail applications. - Helen McBreen (2002)

Experimental Evaluation of the Use of ECAs in ecommerce Applications. - Hazel Morton; Helen McBreen; Mervyn A. Jack (From Brows to Trust, 2004)