1. Rosenfield A.H. Selkowitz S.E. ( 1976 ). ‘Beam daylighting; direct use of solar energy for interior illumination’ . Proceedings of the International Solar Energy Society annual conference .
2. An Analysis of Innovative Methods in Natural Lighting
3. Rodgers N.C. ( 1980 ). ‘Beam sunlighting as an energy conservation technique’ . Paper given to the ANZAScA Conference , Sydney .