Karachentsev I.; Lebedev V.; Shcherbanovskij A. (). „Catalogue of isolated pairs of galaxies in the northern hemisphere”. Bulletin d'Information du Centre de Donnees Stellaires. 29: 87–88. Bibcode:1985BICDS..29...87K. WikidataQ66617506.
Karachentsev I.; Lebedev V.; Shcherbanovskij A. (). „Catalogue of isolated pairs of galaxies in the northern hemisphere”. Bulletin d'Information du Centre de Donnees Stellaires. 29: 87–88. Bibcode:1985BICDS..29...87K. WikidataQ66617506.