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2000NewAR..44..497H - New Astronomy Reviews, 44, 497-501 (2000)
The contribution of narrow-line Seyfert 1 galaxies to the soft X-ray background.
HASINGER G., LEHMANN I., SCHMIDT M., GUNN J.E., SCHNEIDER D.P., GIACCONI R., TRUEMPER J. and ZAMORANI G.
Journal keyword(s):
Nomenclature: RDS NNNA (No. 477A) added.
CDS comments: In reflist: Lehmann 2000, p. 34 misprint for p. 35 (2000A&A...354...35L).
Simbad objects: 3
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