@article{Funk2007,
author = {Funk, J.L.  and Rogge, R.D. },
title= {Testing the ruler with item response theory: Increasing precision of measurement for relationship satisfaction with the Couples Satisfaction Index},
year = {2007},
doi = {10.1037/0893-3200.21.4.572},
journal = {Journal of Family Psychology },
volume = {21},
number = {4},
pages = {527--583},
}