Missing Link Found? The "Runaway" Path to Supermassive Black Holes - T. Ebisuzaki; J. Makino; T. G. Tsuru; Y. Funato; S. F. Portegies Zwart; P. Hut; S. L. W. McMillan; S. Matsushita; H. Matsumoto; R. Kawabe (Astrophysical Journal, 2001)