@manual{Romankiewicz:1981,
  author = "F. Romankiewicz and S. Zochniak",
  title  = "Modyfikator miedzi i jej stopów, Patent #: 111335",
  note   = "Date of application: 10-07-1978, Date of acceptance: 30-11-1981",
  year   = "1981",
}