Pulsar microstructure and its quasi-periodicities with the S2 VLBI system at a resolution of 62.5 nanosecondsM. V. Popov, N. Bartel, W. H. Cannon, A. Yu. Novikov, V. I. Kondratiev and V. I. AltuninA&A, 396 1 (2002) 171-187DOI: https://doi.org/10.1051/0004-6361:20021402