Cross-References for Pismis 18

0) Numbering system adopted in WEBDA
1) Piatti A.E. et al. 1998, Astron. J. 116, 801
2) Moffat A.F.J., Vogt N. 1973, Astron. Astrophys. Suppl. 10, 135
3) Tadross A.L. 2008, New Astronomy 13, 370