E. Zackrisson, N. Bergvall, T. Marquart & Phillip Helbig
"Can microlensing explain the long-term optical variability of quasars?"
A&A, 408, 1, 17–25 (September (I) 2003)
doi:10.1051/0004-6361:20030895 | ADS: 2003A&A...408...17Z | Google Scholar