—’According to authors Philippe Margotin and Jean-Michel Guesdon, Dylan…after JFK's assassination’: page 87, Guesdon, Jean-Michel; Margotin, Philippe, Bob Dylan All the Songs: The Story Behind Every Track. Black Dog & Leventhal Publishers, 2015

—’Biographer Clinton Heylin has pointed out that…beginning a sustained period of topical songwriting’: page 89, Heylin, Clinton, Behind the Shades: The 20th Anniversary Edition. Faber & Faber, 2011.