@article{Wheeler1987,
author = {Wheeler, R.H. and Gunter, B.G.},
title= {Change in spouse age difference at marriage: A challenge to traditional family and sex roles?},
year = {1987},
doi = {10.1111/j.1533-8525.1987.tb00303.x},
volume = {28},
number = {3},
pages = {411--421},
}