Sayer, J. R. (1993). Preferred levels of image sharpness and their relation to image structure in thermal dye transfer prints. Unpublished doctoral dissertation, Virginia Polytechnic Institute & State University, Blacksburg, VA.
Sayer, J. R. (1991). The perception of moderate and large color differences in photographic prints: An evaluation of five color-difference equations. Unpublished master’s thesis, Virginia Polytechnic Institute & State University, Blacksburg, VA.