Alves, João F.; Lada, Charles J.; Lada, Elizabeth A. (Ιανουάριος 2001). «Internal structure of a cold dark molecular cloud inferred from the extinction of background starlight». Nature409 (6817): 159–161. doi:10.1038/35051509. PMID11196632. Bibcode: 2001Natur.409..159A.
Nielbock, Markus; Launhardt, Ralf; Steinacker, Jürgen (Αύγουστος 2012). «The Earliest Phases of Star formation observed with Herschel (EPoS): The dust temperature and density distributions of B68». Astronomy and Astrophysics547: A11. doi:10.1051/0004-6361/201219139. Bibcode: 2012A&A...547A..11N.
Alves, João F.; Lada, Charles J.; Lada, Elizabeth A. (Ιανουάριος 2001). «Internal structure of a cold dark molecular cloud inferred from the extinction of background starlight». Nature409 (6817): 159–161. doi:10.1038/35051509. PMID11196632. Bibcode: 2001Natur.409..159A.
Nielbock, Markus; Launhardt, Ralf; Steinacker, Jürgen (Αύγουστος 2012). «The Earliest Phases of Star formation observed with Herschel (EPoS): The dust temperature and density distributions of B68». Astronomy and Astrophysics547: A11. doi:10.1051/0004-6361/201219139. Bibcode: 2012A&A...547A..11N.
Alves, João F.; Lada, Charles J.; Lada, Elizabeth A. (Ιανουάριος 2001). «Internal structure of a cold dark molecular cloud inferred from the extinction of background starlight». Nature409 (6817): 159–161. doi:10.1038/35051509. PMID11196632. Bibcode: 2001Natur.409..159A.