REFERENCES
Allen, R.J., Darchy, B.F., Lauqué, R.:
1971, Astron. Astrophys. 10, 198
Allen, R. J., Hamaker, J., Wellington, K. J.:
1974, Astron. Astrophys. 31, 71
Anderson, K. S.:
1974, Astrophys. J. 189, 195
Anderson, K. S., Kraft, R. P.:
1969, Astrophys. J. 158, 859
Anderson, K. S., Kraft, R. P.:
1971, Astrophys. J. Letters 165, L3
Arp, H. C.:
1975, Publ. Astron. Soc. Pacific 87, 545
Arp, H. C.:
1977, (in preparation)
Bahcall, J.N., Ekers, R.D.:
1969, Astrophys. J. 157, 1055
Bosma, A.:
1977, (in preparation)
Bosma, A., Van der Hulst, J. M., Sullivan III, W.T.:
1977, (in press)
Brosche, P., Einasto, J., Rümmel, U.:
1974, Bibliography on the Structure of Galaxies,
Veröff. Astron. Inst. Heidelberg, No. 26
Bruyn, A.G. de, Willis, A.G.:
1974, Astron. Astrophys., 33, 351
Davies, R.D.:
1973, Monthly Notices Roy. Astron. Soc. 161, 25P
Dent, W.A.:
1971, Astrophys. J. 165, 451
Ekers, R.D., Van der Hulst, J.M., Miley, G.K.:
1976, Nature 262, 369
Fricke, K.J., Reinhardt, M.:
1974, Astron. Astrophys. 37, 349
Giacconi, R.:
1973, Physics Today, May 1973, p. 38
Gursky, H., Kellogg, E.M., Leong, C., Tananbaum,
H., Giacconi, R.:
1971, Astrophys. J. Letters 165, L43
Högbom, J.A.:
1974, Astron. Astrophys. Suppl. 15, 417
Holmberg, E.:
1937, A study of double and multiple galaxies, Annals
Lund No. 6
Low, F.J., Kleinmann, D.E.:
1968, Astron. J. 73, 868
Nilsson, P.:
1973, Uppsala General Catalogue of Galaxies, Nova
Acta Regiae Societatis Scientiarum Upsaliensis Ser. V:A, Vol. 1
Roberts, M.S.:
1976, Radio observations of neutral hydrogen in
galaxies, in Galaxies and the Universe, Vol. IX of Stars and Stellar
Systems, ed. A. and M. Sandage and J. Kristian
Schwarzschild, M.:
1973, Astrophys. J. 182, 357
Simkin, S. M.:
1975, Astrophys. J. 200, 567
Souffrin, S.:
1969, Astron. Astrophys. 1, 305
Ulrich, M.H.:
1973, Astrophys. J. 181, 51
Vaucouleurs, G. de:
1975, Astrophys. J. Suppl. 29, No. 284, 193
Vaucouleurs, G. de, Vaucouleurs, A. de:
1964, Reference Catalogue of Bright Galaxies,
University of Texas Press, Austin
Warner, P.J, Wright, M.C.H., Baldwin, J.E.:
1973, Monthly Notice Roy. Soc. 163, 163
Young, D. S. de, Roberts, M.S., Saslaw, W.C.:
1973, Astrophys. J. 185, 809