@article{Kaltenegger:2020,
author
=
"K.Kaltenegger and W.Winiwarter",
title
=
"Global Gridded Nitrogen Indicators: Influence of Crop Maps",
journal
=
"Global Biogeochemical Cycles",
volume
=
"Vol. 24",
pages
=
"1--17",
year
=
"2020",
}