A transient variable 6 Hz QPO from GX 339-4E. Nespoli, T. Belloni, J. Homan, J. M. Miller, W. H. G Lewin, M. Méndez and M. van der KlisA&A, 412 1 (2003) 235-240DOI: https://doi.org/10.1051/0004-6361:20031423
