D. C. Backer, J. M. Rankin, and D. B. Campbell, Pulsar fluctuation spectra and the generalized drifting-subpulse phenomenon. II, The Astrophysical Journal, vol.197, p.481, 1975.
DOI : 10.1086/153533

W. F. Brisken, J. M. Benson, W. M. Goss, and S. E. Thorsett, Very Long Baseline Array Measurement of Nine Pulsar Parallaxes, The Astrophysical Journal, vol.571, issue.2, p.906, 2002.
DOI : 10.1086/340098

J. C. Clemens and R. Rosen, Observations of Nonradial Pulsations in Radio Pulsars, The Astrophysical Journal, vol.609, issue.1, p.340, 2004.
DOI : 10.1086/421013

J. C. Clemens and R. Rosen, A Pulsational Model for the Orthogonal Polarization Modes in Radio Pulsars, The Astrophysical Journal, vol.680, issue.1, p.664, 2008.
DOI : 10.1086/587474

H. D. Craft, J. M. Comella, and F. D. Drake, Submillisecond Radio Intensity Variations in Pulsars, Nature, vol.218, issue.5147, p.1122, 1968.
DOI : 10.1038/2181122a0

A. A. Deshpande and J. M. Rankin, The topology and polarization of sub-beams associated with the 'drifting' sub-pulse emission of pulsar B0943+10-I. Analysis of Arecibo 430- and 111-MHz observations, Monthly Notices of the Royal Astronomical Society, vol.322, issue.3, p.438, 2001.
DOI : 10.1046/j.1365-8711.2001.04079.x

F. D. Drake and H. D. Craft, Second Periodic Pulsation in Pulsars, Nature, vol.220, issue.5164, p.231, 1968.
DOI : 10.1038/220231a0

R. T. Edwards and B. W. Stappers, Drifting sub-pulse analysis using the two-dimensional Fourier transform, Astronomy & Astrophysics, vol.393, issue.2, p.733, 2002.
DOI : 10.1051/0004-6361:20021067

URL : http://arxiv.org/abs/astro-ph/0207472

A. V. Filippenko and V. Radhakrishnan, Pulsar nulling and drifting subpulse phase memory, The Astrophysical Journal, vol.263, p.828, 1982.
DOI : 10.1086/160553

J. Gil, F. Haberl, and G. Melikidze, Observations of Radio Pulsars B0834+06 and B0826???34 and Implications for the Pulsar Inner Accelerator, The Astrophysical Journal, vol.686, issue.1, p.497, 2008.
DOI : 10.1086/590657

T. E. Hassall, Frequency-dependent delay from the pulsar magnetosphere
DOI : 10.1051/0004-6361/201220764

URL : http://arxiv.org/abs/1302.2321

J. Gil, G. I. Melikidze, and U. Geppert, Drifting subpulses and inner acceleration regions in radio pulsars, Astronomy & Astrophysics, vol.407, issue.1, p.315, 2003.
DOI : 10.1051/0004-6361:20030854

URL : http://arxiv.org/abs/astro-ph/0305463

T. E. Hassall, B. W. Stappers, and J. W. Hessels, Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations, Astronomy & Astrophysics, vol.543, pp.66-661, 0198.
DOI : 10.1051/0004-6361/201218970

URL : https://hal.archives-ouvertes.fr/insu-01253922

R. Karuppusamy, B. Stappers, and W. Van-straten, PuMa-II: A Wide Band Pulsar Machine for the Westerbork Synthesis Radio Telescope, Publications of the Astronomical Society of the Pacific, vol.120, issue.864, p.191, 2008.
DOI : 10.1086/528699

A. G. Lyne and M. Ashworth, The effect of nulls upon subpulse drift in PSRs 0809 + 74 and 0818 - 13, Monthly Notices of the Royal Astronomical Society, vol.204, issue.2, p.519, 1983.
DOI : 10.1093/mnras/204.2.519

M. Proszynski and A. Wolszczan, A cross-correlation analysis of subpulse drift in PSR 0809 + 74, PSR 1237 + 25 and PSR 1919 + 21, The Astrophysical Journal, vol.307, p.540, 1986.
DOI : 10.1086/164442

J. M. Rankin, Toward an Empirical Theory of Pulsar Emission - Part Two - on the Spectral Behavior of Component Width, The Astrophysical Journal, vol.274, p.359, 1983.
DOI : 10.1086/161451

J. M. Rankin, R. Ramachandran, and S. A. Suleymanova, $_\mathsf{2}$) variations, Astronomy & Astrophysics, vol.429, issue.3, p.999, 2005.
DOI : 10.1051/0004-6361:20041442

R. Rosen and J. C. Clemens, A Quantitative Nonradial Oscillation Model for the Subpulses in PSR B0943+10, The Astrophysical Journal, vol.680, issue.1, p.671, 2008.
DOI : 10.1086/587476

R. Rosen and P. Demorest, A QUANTITATIVE MODEL FOR DRIFTING SUBPULSES IN PSR B0809+74, The Astrophysical Journal, vol.728, issue.2, p.156, 2011.
DOI : 10.1088/0004-637X/728/2/156

M. A. Ruderman and P. G. Sutherland, Theory of pulsars - Polar caps, sparks, and coherent microwave radiation, The Astrophysical Journal, vol.196, p.51, 1975.
DOI : 10.1086/153393

D. H. Staelin, M. S. Ewing, R. M. Price, J. M. Sutton, B. W. Stappers et al., Slow Periodic Variations in Pulsars, The Astrophysical Journal, vol.160, issue.429, pp.7-20, 1970.
DOI : 10.1086/180512

H. M. Van-horn, Micropulses, drifting subpulses, and nonradial oscillations of neutron stars, The Astrophysical Journal, vol.236, p.899, 1980.
DOI : 10.1086/157816

A. G. Van-leeuwen, M. L. Kouwenhoven, R. Ramachandran, J. M. Rankin, and B. W. Stappers, Null-induced mode changes in PSR??B0809+74, Astronomy & Astrophysics, vol.387, issue.1, p.169, 2002.
DOI : 10.1051/0004-6361:20020254

M. Für-radioastronomie, C. /. Insu, and . Nançay, UMR 7328 CNRS, 45071 Orléans Cedex 02, France 10 ARC Centre of Excellence for All-sky astrophysics (CAASTRO) Sternwarte 5, 07778 Tautenburg, Germany 12 Department of Astrophysics/IMAPP, Radboud University Nijmegen, PO Box 9010, 6500 GL Nijmegen, The Netherlands 13 International Centre for Radio Astronomy Research ? Curtin University Australia 14 Argelander-Institut für Astronomie Auf dem Hügel 71 The Netherlands 18 Institute for Astronomy, 44 Rosehill Street Redfern, NSW 2016 Sydney, Australia 11 Thüringer Landessternwarte 16 Onsala Space Observatory Onsala, Sweden 17 Kapteyn Astronomical Institute 21 Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany 22 Research School of Astronomy and Astrophysics, Australian National University, Mt Stromlo Obs., via Cotter Road The Netherlands 26 Astronomisches Institut der Ruhr, pp.44780-44789, 28759.

. Av, Charles André, 69561 Saint Genis Laval Cedex, France 28 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street