Cross-References for NGC 1027

0) Numbering system adopted in WEBDA
1) Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17,347 (pe)
2) Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17,347 (pg)
3) Clasen M.-C. 1937, Astr. Nach. 264, 33
4) Maciejewski G. & Niedzielski A. 2007, Astron. Astrophys. 467, 1065