Extremely metal-poor Lyman limit system at toward the quasar HE 0940–1050S. A. Levshakov, I. I. Agafonova, M. Centurión and P. MolaroA&A, 397 3 (2003) 851-857DOI: https://doi.org/10.1051/0004-6361:20021561
toward the quasar HE 0940–1050 toward the quasar HE 0940–1050