Loren, Robert B. (15 Mart 1989). "The cobwebs of Ophiuchus. I - Strands of (C-13)O - The mass distribution". Astrophysical Journal, Part 1. Cilt 338. ss. 902-924. Bibcode:1989ApJ...338..902L. doi:10.1086/167244.
Loren, Robert B. (15 Mart 1989). "The cobwebs of Ophiuchus. I - Strands of (C-13)O - The mass distribution". Astrophysical Journal, Part 1. Cilt 338. ss. 902-924. Bibcode:1989ApJ...338..902L. doi:10.1086/167244.