Perlmutter, S. (June 1999). "Measurements of Omega and Lambda from 42 High-Redshift Supernovae". The Astrophysical Journal517 (2): 565–586. doi:10.1086/307221. Bibcode: 1999ApJ...517..565P.
Perlmutter, S. (June 1999). "Measurements of Omega and Lambda from 42 High-Redshift Supernovae". The Astrophysical Journal517 (2): 565–586. doi:10.1086/307221. Bibcode: 1999ApJ...517..565P.