@phdthesis{76707, author = {R. Todling and S.E. Cohn}, title = {Some strategies for Kalman filtering and smoothing}, year = {1996}, journal = {Workshop on non-linear aspects of data assimilation, 9-11 September 1996}, pages = {91-112}, month = {1996}, publisher = {ECMWF}, address = {Shinfield Park, Reading}, language = {eng}, }