Laura R.; Penny; Seyle, Debra; Gies, Douglas R.; Harvin, James A.; Bagnuolo, William G.; Thaller, M. L.; Fullerton, A. W.; Kaper, L. Tomographic Separation of Composite Spectra. VII. The Physical Properties of the Massive Triple System HD 135240 (δ Circini) (англ.) // The Astrophysical Journal : journal. — IOP Publishing, 2001. — Vol. 548, no. 2. — P. 889. — doi:10.1086/319031. — Bibcode: 2001ApJ...548..889P.
Laura R.; Penny; Seyle, Debra; Gies, Douglas R.; Harvin, James A.; Bagnuolo, William G.; Thaller, M. L.; Fullerton, A. W.; Kaper, L. Tomographic Separation of Composite Spectra. VII. The Physical Properties of the Massive Triple System HD 135240 (δ Circini) (англ.) // The Astrophysical Journal : journal. — IOP Publishing, 2001. — Vol. 548, no. 2. — P. 889. — doi:10.1086/319031. — Bibcode: 2001ApJ...548..889P.