1997A&AS..125..149D
1998A&A...329..291Y
1999A&AS..135..339L
2001ApJS..134..331D
2002ApJS..139..281L
2003ApJS..144..135Y
2006ApJS..162..261L
2006ApJS..166..421L
2009A&A...498..915D
2009ApJ...706....1L
2009ApJ...707..173Y
2012ApJ...744...99L
2013ApJ...763...86L
2015A&A...582A..56D
2019ApJS..241...22D