Bryson Burroughs. "A Gift of Russian Icons." Metropolitan Museum of Art Bulletin 28 (August 1933), p. 138, mentions this icon as one of three heads [the others being MMA 33.79.15 and 33.79.18] from a 17th century Deësis, possibly produced in a Greco-Italian workshop.
Harry B. Wehle. The Metropolitan Museum of Art: A Catalogue of Italian, Spanish, and Byzantine Paintings. New York, 1940, p. 4, notes that the Head of Christ bears the signature of Emmanuel Tzanès and attributes all three panels from the deesis to him.
Thalia Gouma-Peterson. Letter to Gretchen Wold. November 2, 1988, supports the attribution to Tzanès, noting, however, that they could be 19th century copies; states that only thorough technical examination can establish their authenticity.