text: *H. Schubert, History of British Iron and Steel Industry c.450 BC to AD 1775 (1957), 272–291.
  *A. den Ouden, "The Production of Wrought Iron in Finery Hearths", Historical Metallurgy 15(2) (1981), 63–87 and 16(1) (1982), 29–33.  
  *K-G. Hildebrand, Swedish Iron in the Seventeenth and Eighteenth Centuries: Export Industry Before Industrialization (Stockholm 1992).   
  *P. King, The Cartel in Oregrounds Iron: Trading in the Raw Material for Steel During the 18th century", Journal of Industrial History' 6 (2003), 25–48.