Jeffrey G. Mangum; Stephen E. Schneider; Trinh X. Thuan; John Miller (iulie 1992). „Northern dwarf and low surface brightness galaxies. II - The Green Bank neutral hydrogen survey”. The Astrophysical Journal Supplement Series (în engleză). 81: 5–33. Bibcode:1992ApJS...81....5S. doi:10.1086/191684. WikidataQ57453699.
Jeffrey G. Mangum; Stephen E. Schneider; Trinh X. Thuan; John Miller (iulie 1992). „Northern dwarf and low surface brightness galaxies. II - The Green Bank neutral hydrogen survey”. The Astrophysical Journal Supplement Series (în engleză). 81: 5–33. Bibcode:1992ApJS...81....5S. doi:10.1086/191684. WikidataQ57453699.
Jeffrey G. Mangum; Stephen E. Schneider; Trinh X. Thuan; John Miller (iulie 1992). „Northern dwarf and low surface brightness galaxies. II - The Green Bank neutral hydrogen survey”. The Astrophysical Journal Supplement Series (în engleză). 81: 5–33. Bibcode:1992ApJS...81....5S. doi:10.1086/191684. WikidataQ57453699.