AOS92  1992ESOPN...1....1A Acker et al.            Cat. <V/84>
AGC96  1996A&A...305..944A Acker et al. 
Al76   1976MSRSL...9..271A Aller 
AK85   1985PASP...97.1142A Aller & Keyes 
CMB98  1998MNRAS.296..367C Crowther et al. 
CG73   1973A&AS...11..335C Cesco & Gibson 
CJA87  1987ApJS...64..529C Chu, Jacoby & Arendt 
CJ87   1987ApJ...321L.151C Cohen & Jones 
DH91   1991AcApS..11..172D Dong & Hu 
F99    1999ApJ...514..296F Feibelman 
GS02   2002IAUS..209.....G Gorny & Siodmia
HB90   1990A&A...234..435H Hu & Bibo 
HS70   ................... Hack & Struve          1970, Stellar spectroscopy. Vol. 2: Peculiar stars, Trieste Oss. Astr.
Ha96   1996Ap&SS.238...31H Hamann 
He82   1982IAUS...99..423H Heap 
HCLS81 1981SSRv...28..227V van der Hucht et al.   Cat. <III/85>
KH97   1997IAUS..180..114K Koesterke & Hamann     and 1997A&A...320...91K
KS84   1984ApJ...278..195K Kaler & Shaw 
KSFI91 1991PASP..103...67K Kaler et al. 
LH98   1998A&A...330..265L Leuenhagen & Hamann 
LHJ94  1994A&AS..103..445L Leuenhagen et al. 
LHJ96  1996A&A...312..167L Leuenhagen et al. 
LSB00  2000MNRAS.312..585L Liu et al. 
Lu77   1977ApJ...211..469L Lutz 
Lu78   1978IAUS...76..185L Lutz 
M91    1991IAUS..145..375M Mendez 
MN79   1979ApJ...232..496M Mendez & Niemela 
MN82   1982IAUS...99..457M Mendez & Niemela 
MPR01  2001MNRAS.322..877M Morgan et al. 
PMH01  ................... Parker et al.          in prep          
P02    2002IAUS..209.....P Parker                 in press 
PAS98  1998A&A...329L...9P Parthasarathy et al.  (see the text)
PSM98  1998A&A...337..866P Pena et al. 
PSM01  2001A&A...367..983P Pena et al. 
SA69   1969ApJ...157.1245S Smith & Aller 
TAS93  1993A&AS..102..595T Tylenda et al. 
V88    1998Priv.com....... Volk                  Private communication
W75    1975MNRAS.173..437W Webster 
Kl91   1991PASP..103...67K Kaler et al.