@ARTICLE{
author={Denifl S,Gstir B,Hanel G,Feketeova L,Matejcik Stefan,Becker K,Stamatovic Aleksandar S,Scheier Paul,Mark TD},
year={2002},
title={Multiple ionization of helium and krypton by electron impact close to threshold: appearance energies and Wannier exponents},
journal={JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS},
volume={35},
number={22},
pages={4685-4694},
document_type={Article},
}