early records of Helsingør and Flynderborg ("possibly already mentioned by Saxo"): J. D. Qvist, Annaler for nordisk oldkyndighed, Kongelige Nordiske oldskriftselskab, 1836, p. 306Archived 26 February 2015 at the Wayback Machine
Bolt, Rodney (5 February 2016). "Shakespeare's Danish links". The Telegraph. Archived from the original on 4 February 2018. Retrieved 6 April 2018 – via www.telegraph.co.uk.
Bolt, Rodney (5 February 2016). "Shakespeare's Danish links". The Telegraph. Archived from the original on 4 February 2018. Retrieved 6 April 2018 – via www.telegraph.co.uk.
early records of Helsingør and Flynderborg ("possibly already mentioned by Saxo"): J. D. Qvist, Annaler for nordisk oldkyndighed, Kongelige Nordiske oldskriftselskab, 1836, p. 306Archived 26 February 2015 at the Wayback Machine