@article{Nicolaisen2014,
author = {Nicolaisen, M. and Thorsen, K.},
title= {Who are lonely? Loneliness in different age groups (18–81 years old), using two measures of loneliness},
year = {2014},
doi = {10.2190/AG.78.3.b},
volume = {78},
number = {3},
pages = {229--257},
}