@article{Valtonen:2016,
author
=
"M.Valtonen and S.Zola and M.Żejmo and -.[et. al.]",
title
=
"Primary black hole spin in OJ 287 as determined by the general relativity centenary flare",
journal
=
"Astrophysical Journal Letters",
volume
=
"Vol. 819",
pages
=
"1--6",
year
=
"2016",
}