A Study of marketing research commitment by major retailers

http://deepblue.lib.umich.edu/bitstream/2027.42/35961/2/b1375830.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/35961/1/b1375830.0001.001.tx

On using voice analysis in marketing research

http://deepblue.lib.umich.edu/bitstream/2027.42/35960/2/b1376056.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/35960/1/b1376056.0001.001.tx