T. Damour and A. Vilenkin, Gravitational radiation from cosmic (super)strings: Bursts, stochastic background, and observational windows, Physical Review D, vol.71, issue.6, p.63510, 2005.
DOI : 10.1103/PhysRevD.71.063510

URL : http://arxiv.org/abs/hep-th/0410222

S. Detweiler, Pulsar timing measurements and the search for gravitational waves, The Astrophysical Journal, vol.234, p.1100, 1979.
DOI : 10.1086/157593

F. Estabrook and H. Wahlquist, Response of Doppler spacecraft tracking to gravitational radiation, General Relativity and Gravitation, vol.227, issue.5, p.439, 1975.
DOI : 10.1007/BF00762449

R. Foster and D. Backer, Constructing a pulsar timing array, The Astrophysical Journal, vol.361, p.300, 1990.
DOI : 10.1086/169195

G. B. Hobbs, The International Pulsar Timing Array project: using pulsars as a gravitational wave detector, Classical and Quantum Gravity, vol.27, issue.8, p.84013, 2010.
DOI : 10.1088/0264-9381/27/8/084013

A. Jaffe and D. Backer, Gravitational Waves Probe the Coalescence Rate of Massive Black Hole Binaries, The Astrophysical Journal, vol.583, issue.2, p.616, 2003.
DOI : 10.1086/345443

F. Jenet, Upper Bounds on the Low???Frequency Stochastic Gravitational Wave Background from Pulsar Timing Observations: Current Limits and Future Prospects, The Astrophysical Journal, vol.653, issue.2, p.1571, 2006.
DOI : 10.1086/508702

V. M. Kaspi, J. H. Taylor, and M. F. Ryba, High-precision timing of millisecond pulsars. 3: Long-term monitoring of PSRs B1855+09 and B1937+21, The Astrophysical Journal, vol.428, p.713, 1994.
DOI : 10.1086/174280

M. P. Mchugh, G. Zalamansky, F. Vernotte, and E. Lantz, Pulsar timing and the upper limits on a gravitational wave background: A Bayesian approach, Physical Review D, vol.54, issue.10, p.5993, 1996.
DOI : 10.1103/PhysRevD.54.5993

E. M. Splaver, D. J. Nice, I. H. Stairs, A. N. Lommen, and D. D. Backer, Masses, Parallax, and Relativistic Timing of the PSR J1713+0747 Binary System, The Astrophysical Journal, vol.620, issue.1, p.405, 2005.
DOI : 10.1086/426804

J. H. Taylor, Pulsar Timing and Relativistic Gravity, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.341, issue.1660, p.117, 1992.
DOI : 10.1098/rsta.1992.0088

G. Tofani, Status of the Sardinia Radio Telescope project, Ground-based and Airborne Telescopes II, p.1005, 2008.
DOI : 10.1117/12.790503

J. P. Verbiest, Status update of the Parkes pulsar timing array, Classical and Quantum Gravity, vol.27, issue.8, p.84015, 2010.
DOI : 10.1088/0264-9381/27/8/084015

A. Vilenkin, Gravitational radiation from cosmic strings, Physics Letters B, vol.107, issue.1-2, p.47, 1981.
DOI : 10.1016/0370-2693(81)91144-8

J. Wyithe and A. Loeb, Self???regulated Growth of Supermassive Black Holes in Galaxies as the Origin of the Optical and X???Ray Luminosity Functions of Quasars, The Astrophysical Journal, vol.595, issue.2, p.614, 2003.
DOI : 10.1086/377475