@misc{senegas_error_covariance_2001, 
author={Senegas, J., Wackernagel, H., Rosenthal, W., Wolf, T.},
title={Error covariance modeling in sequential data assimilation},
year={2001},
howpublished = {journal article},
note = {Senegas, J.; Wackernagel, H.; Rosenthal, W.; Wolf, T.: Error covariance modeling in sequential data assimilation. Stochastic Environmental Research and Risk Assessment. 2001. vol. 15, no. 1, 65-86.}}