Bibliography (Once upon a time)

Dreyer and the national film in Denmark / Casper Tybjerg. In: Film History, vol. 13, no. 1, 2001, s. 23-36.

The restoration of Dreyer’s Der var engang / Casper Tybjerg & Thomas C. Christensen. In: Journal of Film Preservation, no. 67, 2004, s. 31-36.