The Nature of the Bright ULX X-2 in NGC 3921: A Chandra Position and HST Candidate Counterpart
Journal article published in 2012 by
P.~G Jonker,
M. Heida,
M.~A.~P Torres,
J.~C.~A Miller-Jones,
A.~C Fabian,
E.~M Ratti,
G. Miniutti,
D.~J Walton,
T.~P Roberts 
