1 S.G. Starrfield, W.. Sparks, and J.W. Truran, in (Springer Berlin Heidelberg, Berlin, Heidelberg, 1987), pp. 401–405.
1 E.M. Sion, S.G. Starrfield, M.E. Van Steenberg, W.. Sparks, J.W. Truran, and R.E. Williams, The Astronomical Journal 92, (1986).