2–10 keV luminosity of high-mass binaries as a gauge of ongoing star-formation rate M. Persic, Y. Rephaeli, V. Braito, M. Cappi, R. Della Ceca, A. Franceschini and D. E. Gruber A&A, 419 3 (2004) 849-862 Published online: 07 May 2004 DOI: 10.1051/0004-6361:20034500