@manual{Bieniaszewska:2017,
  author  = "M. Bieniaszewska and M. Michalski and E. Gdula and W. Babirecki",
  title  = "Zawór kontrolny, Patent #: 69466",
  note   = "Date of application: 10-04-2017, Date of acceptance: 31-10-2017",
  year   = "2017",
}