BibTex format
@article{Graven:2020:10.1029/2019GB006170,
author = {Graven, H and Keeling, RF and Rogelj, J},
doi = {10.1029/2019GB006170},
journal = {Global Biogeochemical Cycles: an international journal of global change},
pages = {1--21},
title = {Changes to carbon isotopes in atmospheric CO2 over the industrial era and into the future},
url = {http://dx.doi.org/10.1029/2019GB006170},
volume = {34},
year = {2020}
}