@article{article55eb594b, title = {Extension of the ICRF for selected areas down to the 15th magnitude}, author = {Camargo, J I B and Teixeira, R and Benevides-Soares, Paulo and Ducourant, C}, year = {2001}, doi = {10.1051/0004-6361:20010843}, journal = {Astronomy and Astrophysics} }