@article{MENGISTU05_JQSRT,
   author = "G. {Mengistu Tsidu}",
   title  = "On the Accuracy of Covariance Matrix: Hessian versus
             {G}auss--{N}ewton Methods in Atmospheric Remote Sensing
             with Infrared Spectroscopy",
   journal= "J. Quant. Spectrosc. Radiat. Transfer",
   volume = "96",
   number = "1",
   pages  = "103-121",
   doi    = "10.1016/j.jqsrt.2004.11.014",
   year   = "2005"   }