@online{Syllabus,
  language = {bulgarian},
  title = {Конспект за ДИ за спец. статистика},
  url = {https://intranet.fmi.uni-sofia.bg/index.php/s/KOTdUnmqbrnd0sX},
  urldate = {2019-03-24},
  year = {2018}
}

@book{Фихтенгольц1968Том2,
  author = {Григорий Михайлович Фихтенгольц},
  edition = {6},
  language = {russian},
  publisher = {Наука},
  title = {Основы математического анализа},
  udc = {517.0(075.8)},
  volume = {2},
  year = {1968}
}
