@article{article1203,
  title = {Surface charge influence on the breakdown voltage in he},
  author = {AKAN, T. and CIUPINA, V. and VLADOIU, R. and MUSA, G.},
  journal = {Sigma Journal of Engineering and Natural Sciences},
  year = {2006},
  volume = {24},
  pages = {45-49},
  doi = {}
}