APA   Click to copy
Chatterjee, A., Engelen, R., Kawa, S. R., Sweeney, C., & Michalak, A. (2013). Background error covariance estimation for atmospheric CO2 data assimilation.

Chicago/Turabian   Click to copy
Chatterjee, A., R. Engelen, S. R. Kawa, C. Sweeney, and A. Michalak. “Background Error Covariance Estimation for Atmospheric CO2 Data Assimilation” (2013).

MLA   Click to copy
Chatterjee, A., et al. Background Error Covariance Estimation for Atmospheric CO2 Data Assimilation. 2013.

@article{a2013a,
  title = {Background error covariance estimation for atmospheric CO2 data assimilation},
  year = {2013},
  author = {Chatterjee, A. and Engelen, R. and Kawa, S. R. and Sweeney, C. and Michalak, A.}
}