R. K. Honeycutt, J. W. Robertson, and G. W. Turner, 17. Dezember 1996 : V446 Herculis (Nova Her 1960) Is an Optical Triple: Implications for the Resumption of Dwarf Nova Outbursts following the Nova In: The Astrophysical Journal 495(2):933, doi: 10.1086/305299.