@article{4114,
  author = {Andrey Todorov and Velizar Shalamanov and Todor Tagarev},
  title = {Library Update},
  year = {1998},
  journal = {Information & Security: An International Journal},
  volume = {1},
  pages = {109-113},
  doi = {https://doi.org/10.11610/isij.0121},
  language = {eng},
}