@article{weko_4860_1,
   author	 = "PETRACCA,Stefania and DEMMA,Th.  and HIRATA,Kohji",
   title	 = "Gaussian approximation of the bunch lengthening in electron",
   journal	 = "Physical Review ST Accelerators and Beams",
   year 	 = "2005",
   volume	 = "8",
   number	 = ""
}