@article {Statistical1976,
title = {Statistical Aspects of Subjective Measures of Quality Life,    Occasional Papers in Survey Research No. 4},
year = {1976},
url = {https://www.esri.ie/publications/statistical-aspects-of-subjective-measures-of-quality-life-occasional-papers-in-survey-research-no-4},
author = {Whelan, B.},
}