Long-term X-ray/UV observations of the ultraluminous X-ray source HolmbergII X-1. Atapin, K. E. ; Vinokurov, A. ; Safonova, M. ; Fabrika, S. ; Bordoloi, O. Abstract Publication: The Multifaceted Universe: Theory and Observations - 2000 Pub Date: December 2022 Bibcode: 2022muto.confE..56A