Robertson, Mark A.; Borman, Sean; Stevenson, Robert L. (April 2003). “Estimation-theoretic approach to dynamic range enhancement using multiple exposures”. Journal of Electronic Imaging12 (2): 220, right column, line 26219–228. Bibcode: 2003JEI....12..219R. doi:10.1117/1.1557695. "The first report of digitally combining multiple pictures of the same scene to improve dynamic range appears to be Mann"
Robertson, Mark A.; Borman, Sean; Stevenson, Robert L. (April 2003). “Estimation-theoretic approach to dynamic range enhancement using multiple exposures”. Journal of Electronic Imaging12 (2): 220, right column, line 26219–228. Bibcode: 2003JEI....12..219R. doi:10.1117/1.1557695. "The first report of digitally combining multiple pictures of the same scene to improve dynamic range appears to be Mann"