Bee-havior in a mobile robot: the construction of a self-organized cognitive map and its use in robot navigation within a complex, natural environment. - V. Ashley Walker; John Hallam; David Willshaw (ICNN, 1993)

Evolving Batlike Pinnae for Target Localisation by an Echolocator. - Herbert Peremans; V. Ashley Walker; Georgios Papadopoulos 001; John Hallam (ICES, 1998)

3D Object Localisation with a Binaural Sonarhead, Inspirations from Biology. - Herbert Peremans; V. Ashley Walker; John Hallam (ICRA, 1998)

Good vibrations: Exploiting reflector motion to partition an acoustic environment. - V. Ashley Walker; Herbert Peremans; John C. T. Hallam (Robotics Auton. Syst., 1998)