@article{articled362cbc7,
title   = {Studying focal ratio degradation of optical fibres with a core size of 50 'mu'm for astronomy},
author = {Oliveira, A. C. and Oliveira, L. S. and Santos, Jesulino Bispo dos},
year = {2005},
doi = {10.1111/j.1365-2966.2004.08536.x},
journal   = {Monthly Notices of the Royal Astronomical Society}
}