A04 2004A&A...414..141A Albrecht et al. A95 1995A&A...300..369A Aalto et al. B03 2003A&A...406...87B Boeker et al. B91 1991A&A...241..411B Bajaja et al. B93 1993A&AS...97..887B Braine et al C01 2001A&A...368..824C Curran et al. C92 1992AJ....103.1134C Claussen & Sahai C97 1997A&A...324...41C Contini et al. E96 1996A&AS..115..439E Elfhag et al. Cat. G91 1991ApJ...371..563G Gordon H01 2001A&A...376..837H Horellou et al H93 1993ApJ...419...86H Helfer & Blitz I03 2003A&A...397...87I Israel et al. I05 2005A&A...438..855I Israel I95 1995A&A...295..599I Israel et al. I99 1999A&A...351...10I Israel & Baas K02 2002PASJ...54..541K Kohno et al. K03 2003PASJ...55L...1K Kohno et al. K88 1988ApJS...66..261K Kenney & Young K96 1996A&A...308...27K Knapen et al. L05 2005ApJ...625..763L Leroy et al. L98 1998A&A...330...37L Leon et al. M99 1999A&A...341..256M Mauersberger et al. N01 2001PASJ...53..713N Nishiyama & Nakai P97 1997A&A...325...81P Planesas et al. S05 2005ApJ...632..217S Sheth et al. S89 1989ApJ...344..200S Sage S92 1992A&A...265...19S Sage et al. S93 1993A&A...272..123S Sage S98 1998PASJ...50..317S Shioya et al. T91 1991A&A...252..541T Tacconi et al. T94 1994AJ....108..468T Taniguchi et al. V98 1998AJ....116.1553V Vila-Vilaro et al. W03 2003ApJ...584..260W Welch & Sage W95 1995A&A...297..643W Wiklind et al. Y03 2003ApJ...588..771Y Yao et al. Y95 1995ApJS...98..219Y Young et al.