Black hole spin inferred from 3:2 epicyclic resonance model of high-frequency quasi-periodic oscillationsE. Šrámková, G. Török, A. Kotrlová, P. Bakala, M. A. Abramowicz, Z. Stuchlík, K. Goluchová and W. KluźniakA&A, 578 (2015) A90DOI: https://doi.org/10.1051/0004-6361/201425241