@article{Blossfeld2009,
author = {Blossfeld, Hans-Peter},
title= {Educational Assortative Marriage in Comparative Perspective},
year = {2009},
doi = {10.1146/annurev-soc-070308-115913},
journal = {Annual Review of Sociology},
volume = {35},
number = {1},
pages = {513--530},
}