1. Identification of new young stellar objects associated with IRAS point sources. III - The northern Galactic plane
2. NGC 1893, UBV photometry.
3. Draper, P. W., Taylor, M., & Allan, A. 2000, Starlink User Note 139.12, R.A.L.
4. Hoag, A. A., Johnson, H. L., Iriarte, B., et al. 1961, Publ. Us. Nav. Obs., XVII, part VII, 347