Schuster, H.-E.; Muller, A. B.; Tammann, G. A.; Seitter, W.; Durbeck, H. (1981). "Supernova in NGC 1255". International Astronomical Union Circular (3559): 1. Bibcode:1981IAUC.3559....1S. Retrieved December 9, 2017.
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Schuster, H.-E.; Muller, A. B.; Tammann, G. A.; Seitter, W.; Durbeck, H. (1981). "Supernova in NGC 1255". International Astronomical Union Circular (3559): 1. Bibcode:1981IAUC.3559....1S. Retrieved December 9, 2017.