Françoise Combes; Prugniel P.; Roberto Rampazzo; Bonfanti P.; Sulentic J. W. (). „Stellar dynamics in E+E pairs of galaxies. I. NGC 741/742, 1587/88 and 2672/73. The data”. Astronomy and Astrophysics (în engleză). 297: 28–36. Bibcode:1995A&A...297...28B. WikidataQ66710237.
Françoise Combes; Prugniel P.; Roberto Rampazzo; Bonfanti P.; Sulentic J. W. (). „Stellar dynamics in E+E pairs of galaxies. I. NGC 741/742, 1587/88 and 2672/73. The data”. Astronomy and Astrophysics (în engleză). 297: 28–36. Bibcode:1995A&A...297...28B. WikidataQ66710237.