(en) J. R. Percy, N. Wong, D. Bohme, D. R. Curott, F. Dempsey, G. L. Fortier, M. Ganis, S. Parello et H. J. Landis, « Photometric surveys of suspected small-amplitude red variables. III: An AAVSO photometric photometry survey », Astronomical Society of the Pacific, vol. 106, no 700, , p. 611–615 (DOI10.1086/133420, Bibcode1994PASP..106..611P)
(en) J. R. Percy, N. Wong, D. Bohme, D. R. Curott, F. Dempsey, G. L. Fortier, M. Ganis, S. Parello et H. J. Landis, « Photometric surveys of suspected small-amplitude red variables. III: An AAVSO photometric photometry survey », Astronomical Society of the Pacific, vol. 106, no 700, , p. 611–615 (DOI10.1086/133420, Bibcode1994PASP..106..611P)