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1988

Shepherd, Alex J. and Julian, W.G. and Purcell, A.T. (1988) Gloom in buildings. In: Julian, W.G. (ed.) Light 200: 34th IES National Convention Proceedings. Sydney, Australia: Department of Architectural Science, University of Sydney, pp. 67-72. ISBN 0855891378.

1989

Shepherd, Alex J. and Julian, W.G. and Purcell, A.T. (1989) Gloom as a psychophysical phenomenon. Lighting Research and Technology 21 (3), pp. 89-97. ISSN 1477-1535.

Shepherd, Alex J. and Julian, W.G. and Purcell, A.T. (1989) Surface luminances and gloom. In: UNSPECIFIED (ed.) Proceedings VI Lux Europa Congress. UNSPECIFIED, pp. 31-40.

1990

Shepherd, Alex J. and Julian, W.G. and Purcell, A.T. (1990) Lightness, brightness and gloom in interior lighting. In: UNSPECIFIED (ed.) Proceedings of the CIBSE National Lighting Conference. UNSPECIFIED, pp. 73-86.

1991

Julian, W.G. and Shepherd, Alex J. and Purcell, A.T. (1991) Directions for future studies of the gloom effect. In: UNSPECIFIED (ed.) Proceedings of the CIE 22nd Session. UNSPECIFIED, pp. 89-92.

1992

Shepherd, Alex J. and Julian, W.G. and Purcell, A.T. (1992) Measuring appearance: parameters indicated from gloom studies. Lighting Research and Technology 24 (4), pp. 203-214. ISSN 1477-1535.