Percy, John R.; Fleming, David E. B. (February 1992), "A photometric survey of suspected small-amplitude red variables", Publications of the Astronomical Society of the Pacific, 104: 96–100, Bibcode:1992PASP..104...96P, doi:10.1086/132963.
Percy, John R.; Fleming, David E. B. (February 1992), "A photometric survey of suspected small-amplitude red variables", Publications of the Astronomical Society of the Pacific, 104: 96–100, Bibcode:1992PASP..104...96P, doi:10.1086/132963.