O’Connor, J.; Lee, E.; Rubinstein, F.; Selkowitz, S. (1997). "Tips for Daylighting with Windows"(PDF). Lawrence Berkeley National Laboratory, LBNL-39945. pp. Chapter 8. Archived from the original(PDF) on 16 November 2013. Retrieved 3 September 2009.
O’Connor, J.; Lee, E.; Rubinstein, F.; Selkowitz, S. (1997). "Tips for Daylighting with Windows"(PDF). Lawrence Berkeley National Laboratory, LBNL-39945. pp. Chapter 8. Archived from the original(PDF) on 16 November 2013. Retrieved 3 September 2009.