Mario Krohn. Maleren Christen Købkes Arbejder. Copenhagen, 1915, p. 68, no. 135, as "Kommandør Købke som ung Officer," about 1838?, belonging to Fru. L. Nutzhorn; lists no. 136, a portrait of the sitter's wife Jacobine also belonging to Nutzhorn as its pendant [sale, Kunsthallen Kunstauktioner, Copenhagen, April 25, 1990, no. 123].
Ole Lisberg Jensen. Letter to Gretchen Wold. January 21, 1991, writes that the sitter served in the Royal Danish Navy from 1826 to 1867 and wears an officer's uniform; adds that at the time the portrait was probably painted, around 1838–40, he held the rank of second lieutenant.
Everett Fahy. "Selected Acquisitions of European Paintings at the Metropolitan Museum of Art, 1987–1991." Burlington Magazine 133 (November 1991), p. 807, colorpl. XI.
Sanford Schwartz. Christen Købke. New York, 1992, p. 3, colorpl. 60.
Kasper Monrad. The Golden Age of Danish Painting. Exh. cat., Los Angeles County Museum of Art. New York, 1993, pp. 168–69, no. 73, ill. (color), mentions the unfinished pendant of the sitter's wife, Jacobine (private collection), and states that the MMA picture must have been rolled up before the paint was completely dry; attributes both of these facts to Købke's imminent departure for Italy.
Danish Golden Age Painting - The American Exhibition. Exh. brochure, Statens Museum for Kunst. Copenhagen, 1994, ill. (color).
Kasper Monrad. "Collections Abroad." The Golden Age of Danish Painting. Copenhagen, 1994, p. 40, ill. (color).
Christen Købke, 1810–1848. Ed. Hans Edvard Nørregård-Nielsen and Kasper Monrad. Exh. cat., Statens Museum for Kunst. Copenhagen, 1996, pp. 75, 369–70, no. 135, fig. 47 (color).
Gary Tinterow, ed. Masterpieces of European Painting, 1800–1920, in The Metropolitan Museum of Art. New York, 2007, pp. 45, 265, no. 42, ill. (color and black and white).