W. T. Reach et al.: Properties of Protostars in the Elephant Trunk in the Globule IC 1396A. In: The Astrophysical Journal, Bd. 690, Issue 1, 2009, S. n683ff. bibcode:2009ApJ...690..683R
W. T. Reach et al.: Protostars in the Elephant Trunk Nebula. In: Bulletin of the American Astronomical Society, Bd. 36, 2004, S. 700. bibcode:2004AAS...204.3309R