Pictorial Knowledge Bases. - P. G. Barker; Karim A. Manji (BCS HCI, 1987)

Pictorial Communication with Computers. - P. G. Barker; M. Najah; Karim A. Manji (Int. J. Man Mach. Stud., 1987)

Pictorial Dialogue Methods. - P. G. Barker; Karim A. Manji (Int. J. Man Mach. Stud., 1989)

The Use of Metaphors in Iconic Interface Design. - Stephen Richards; Philip Barker; Ashok Banerji; Charles Lamont; Karim A. Manji (Intell. Tutoring Media, 1994)