Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text W. T. Welford and R. Winston, "Nonconventional optical systems and the brightness theorem," Appl. Opt. 21, 1531-1533 (1982) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
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Welford et al. (1982) studied this question.