@article{Kolbe1991,
author = {Kolbe, R.H. and Burnett, M.S.},
title= {Content-analysis research: An examination of applications with directives for improving research reliability and objectivity},
year = {1991},
doi = {10.1086/209256},
journal = {Journal of Consumer Research},
volume = {18},
number = {2},
pages = {243--250},
}