4 literature references for Bubo virginianus (Gmelin, 1788):

Author: Browning, M. Ralph, and Richard C. Banks
Year: 1990
Title: The identity of Pennant's "Wapacuthu Owl" and the subspecific name of the population of Bubo virginianus from West Hudson Bay
Source: The Journal of Raptor Research, vol. 24, no. 4
Author: Banks, Richard C., and M. Ralph Browning
Year: 1995
Title: Comments on the status of revived old names for some North American birds
Source: The Auk, vol. 112, no. 3
Author: Dickinson, Edward C., ed.
Year: 2003
Source: The Howard and Moore Complete Checklist of the Birds of the World, 3rd edition
Year: 1996
Source: database, NODC Taxonomic Code