1. Acker, A., Ochsenbein, F., Stenholm, B., Tylenda, R., Marcout, J., Schohn, C., 1992. Strasbourg-ESO Catalogue of Planetary Nebulae, ESO, Garching
2. Landolt Bornstein tables – Band Astron. Ap;Aller,1965
3. A distance to the Cepheid HV 829 in the Small Magellanic Cloud