A stereographic technique for floodlighting design

Bellchambers, H.E. , Lambert, G.K. , and Ruff, H.R. , Trans. Illum. Eng. Soc. (London), 26, 107 (1961).

Lambert, G.K. , and Parks, J.F. , Light Ltg, 52, 191 (1959).

Benford, F. , G.E. Rev., 26, 575 (1923); Moon, P. , Scientific Basis of Illuminating Engineering, 389, McGraw Hill (1936).

Petherbridge, P. , Sunpath diagrams and overlays, HMSO (1969).

Petherbridge , P., BRS Current Paper (Research Series) No. 39 (1965). (This Current Paper is now out of print, but the relevant diagrams are contained in reference 4, and in a supplement to reference 4 in course of preparation.)