1 1993A&AS...99..291L Loup et al.           1 of the 3 estimations used
 1ab 1993A&AS...99..291L Loup et al.           2 of the 3 estimations used
1abc 1993A&AS...99..291L Loup et al.           All estimations used
   2 1993ApJS...87..267O Olofsson et al.       and 1993ApJS...87..305O, Olofsson et al.
   3 1999A&AS..140..197G Groenewegen et al.    1 of the 2 estimations used
 3ab 1999A&AS..140..197G Groenewegen et al.    All estimations used
   4 2000A&A...359..586S Schoier & Olofsson
   5 2001A&A...368..969S Schoier & Olofsson
   6 2001A&A...376..997L Le Bertre et al.      Cat. <J/A+A/376/997>
   7 2002A&A...390..501G Groenewegen et al.    Cat. <J/A+A/390/501> and 2002A&A...390..511G, Groenewegen et al., Cat. <J/A+A/390/511>
   8 2003A&A...403..943L Le Bertre et al.      Cat. <J/A+A/403/943>
   9 2004A&A...413..241W Wong et al.
  10 2000A&A...353..583O Olofsson et al.
  11 1998MNRAS.300L..29S Skinner et al.
  12 1998ApJ...509..392M Meixner et al.