BBC: Edward IV (1442 - 1483) - Edward was the eldest surviving son of Richard Plantaganet, Duke of York, who was declared successor to Henry VI in 1460. - http://www.bbc.co.uk/history/historic_figures/edward_iv_king.shtml
The Arrival of Edward IV and the Recovery of His Kingdom - An anonymous contemporary account of the events surrounding the battles on Barnet and Tewkesbury, including a commentary from the 1838 Camden Society edition. - http://www.r3.org/bookcase/arrival1.html