BibTex format
@article{Marra:2007:5/008,
author = {Marra, G and Henderson, D and Oxborrow, M},
doi = {5/008},
journal = {MEASUREMENT SCIENCE AND TECHNOLOGY},
pages = {1224--1228},
title = {Frequency stability and phase noise of a pair of X-band cryogenic sapphire oscillators},
url = {http://dx.doi.org/10.1088/0957-0233/18/5/008},
volume = {18},
year = {2007}
}