@article{James2012,
author = {James, S.L. and Gubbins, P. and Murray, C.J.L. and Gakidou, E.},
title= {Developing a comprehensive time series of GDP per capita for 210 countries from 1950 to 2015},
year = {2012},
doi = {10.1186/1478-7954-10-12},
URL = {https://doi.org/10.1186/1478-7954-10-12},
volume = {10},
number = {12},
}