@article{Harkness2020,
author = {Harkness, S. and Gregg, P. and Fernández, Salgado},
title= {The rise in single-mother families and children’s cognitive development: Evidence form three British birth cohorts},
year = {2020},
doi = {10.1111/cdev.13342},
volume = {91},
number = {5},
pages = {1762--1785},
}