Oikawa, C. Ge, J. Wang, J. R. Eberwein, L. L. Liang, L. A. D. A. G. &. Allsman, and G. D. Jenerette (2015), Unusually high soil nitrogen oxide emissions influence air quality in a high-temperature agricultural region, Nature Communications, 6, 8753, doi:10.1038/ncomms9753.