@InProceedings{,
 author = {W. Elsner, J. Piątkowski},
 booktitle = {Proc. of the 3--rd Internetional Conference Acousticak and Vibratory Surveillance Methods and Diagnostic Techniques},
 title = {Forecasting in condition monitoring of turbogenerators},
 pages = {663--668},
 year = {1998}
 }