H. L. Johnson, B. Iriarte, R. I. Mitchell, W. Z. Wisniewskj, UBVRIJKL photometry of the bright stars, in Communications of the Lunar and Planetary Laboratory, vol. 4, n. 99, 1966.
V* TW PsA -- Variable of BY Dra type, su simbad.u-strasbg.fr, SIMBAD, Centre de Données astronomiques de Strasbourg. URL consultato il 20 gennaio 2010.