Cross-References for NGC 2421

0) Numbering system adopted in WEBDA
1) Yadav R.K.S., sSagar R. 2004, Mon. Not. R. Astron. Soc. 351, 667
2) Babu G.S.D. 1983, J. Astrophys. Astr. 4, 235
3) Ramsay G., Pollaco D.L. 1992, Astron. Astrophys. Suppl. 94, 73