* "Birgit Nilsson, Soprano Legend Who Tamed Wagner" by Bernard Holland, "New York Times" ‏(12 January 2006)* "Så höll han allt hemligt", (why Nilsson's death was kept a secret for 16 days) by Pelle Tagesson, "Aftonbladet" (13 January 2006)* Blum, David, "The Farm Girl and the Stones", chapter 5 in David Blum, "Quintet, Five Journeys toward Musical Fulfillment" ‏(Cornell University Press, 1999).
* "Birgit Nilsson, Soprano Legend Who Tamed Wagner" by Bernard Holland, "New York Times" (12 January 2006)* "Så höll han allt hemligt", (why Nilsson's death was kept a secret for 16 days) by Pelle Tagesson, "Aftonbladet" (13 January 2006)* Blum, David, "The Farm Girl and the Stones", chapter 5 in David Blum, "Quintet, Five Journeys toward Musical Fulfillment" (Cornell University Press, 1999).