Colomb, F. R.; Dubner, G. (1982-08-01). "Neutral hydrogen associated with southern supernova remnants. II - Lupus Loop". Astronomy and Astrophysics. 112: 141–148. Bibcode:1982A&A...112..141C. ISSN0004-6361.
Dubner, GM; Arnal, EM (1988). "Neutral hydrogen and carbon monoxide observations towards the SNR Puppis A". Astronomy and Astrophysics Supplement Series. 75: 363–369. Bibcode:1988A&AS...75..363D.
Colomb, F. R.; Dubner, G. (1982-08-01). "Neutral hydrogen associated with southern supernova remnants. II - Lupus Loop". Astronomy and Astrophysics. 112: 141–148. Bibcode:1982A&A...112..141C. ISSN0004-6361.