1. R. Brinkmann, in: N. Dikanski (Ed.), First Ideas of Electron Cooling at PETRA, Contribution to Workshop on Medium Energy Electron Cooling, Novosibirsk, 1997, p. 157.
2. N.S. Dikansky, V.V. Parkhomchuk, V.M. Petrov, V.G. Shamovsky, A.N. Smirnov, P.D. Vobly, V.N. Volkov, in: N. Dikanski (Ed.), Linac-based Electron Cooling Device, Novosibirsk, 1997, p. 163.
3. K. Balewski, R, Brinkmann, Ya. Derbenev, K. Floettmann, N. Holtkamp, M. Schmitz, G.-A. Voss, P. Wesolowski, D. Yeremian, Preliminary study of electron cooling possibility of Hadronic Beams at PETRA, EPAC98 Conference, Stockholm, 1998.
4. K. Floettmann, A space charge tracking algorithm astra, private communication, 1998.
5. I. Will, private communication, 1999.