@article{Howard2005,
author = {Howard, M.M.},
title= {Variation in dual citizenship policies in the countries of the EU},
year = {2005},
doi = {10.1111/j.1747-7379.2005.tb00285.x},
journal = {International Migration Review},
volume = {39},
number = {3},
pages = {697‒720},
}