ArmstrongJ. D. (1972). An Independent Evaluation of the Kay Binaural Sensor. (Report of an evaluation study carried out at the request of the Scientific Committee of St. Dunstans.)
2.
ArmstrongJ. D. (1975). Evaluation of Man-Machine Systems in the Mobility of the Visually Handicapped. In: Human Factors in Health Care. (ed) PickettR.M., and TriggsT.J.Lexington Books, D.C. Heath and Co, Lexington, Mass., USA, pp. 331–343.
3.
DelafieldG. L., and ArmstrongJ. D. (1977). An intraindividual comparision of the long cane and the dog guide as aids to blind mobility. Blind Mobility Research Unit Report #53.
4.
DoddsA. G., and ShingledeckerC. A. (1979). The Nottingham Obstacle Detector—An Evaluation.Blind Mobility Research Unit Report #63.
5.
LeonardJ. A. (1969). Account of a research programme into blind mobility. Paper presented to the NATO Advanced Study Institute Human Factors/Ergonomics, Mondello, Sicily, Autumn 1969.
6.
ShingledeckerC. A. (1978). The effects of anticipation on performance and processing load in blind mobility.Ergonomics, 21 (5), 355–371.