A catalog of secondary photometric standard stars around gravitational lensesTh. Nakos, E. O. Ofek, P. Boumis, J. Cuypers, D. Sinachopoulos, E. van Dessel, A. Gal-Yam and J. PapamastorakisA&A, 402 3 (2003) 1157-1158DOI: https://doi.org/10.1051/0004-6361:20030310
