N. N.; Samus; Durlevich, O. V. et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013) (англ.) // VizieR On-line Data Catalog: B/gcvs. Originally Published In: 2009yCat....102025S : journal. — 2009. — Vol. 1. — Bibcode: 2009yCat....102025S.
Henry Martyn; Parkhurst; Pickering, Edward Charles. Observations of variable stars (англ.) // Annals of the Astronomical Observatory of Harvard College : journal. — 1893. — Vol. 29, no. 4. — P. 89. — Bibcode: 1893AnHar..29...89P.