@article{Marcus2004,
author = {Marcus, Richards and Beverly, Shipley and Rebecca, Fuhrer and Michael, E. J. Wadsworth},
title= {Cognitive ability in childhood and cognitive decline in mid-life: longitudinal birth cohort study},
year = {2004},
doi = {10.1136/bmj.37972.513819.EE},
journal = {British Medical Journal },
volume = {328},
number = {7439},
pages = {552--554},
}