BibTex format
@article{Campbell:2010:10.1103/PhysRevA.81.050301,
author = {Campbell, S and Paternostro, M and Bose, S and Kim, MS},
doi = {10.1103/PhysRevA.81.050301},
journal = {PHYSICAL REVIEW A},
title = {Probing the environment of an inaccessible system by a qubit ancilla},
url = {http://dx.doi.org/10.1103/PhysRevA.81.050301},
volume = {81},
year = {2010}
}