1. I. LUX and L. KOBLINGER, Monte Carlo Methods for Neutron and Photon Transport Calculations, p. 250, CRC Press, Boca Raton, Florida (1991).
2. S. M. ERMAKOV, “Monte Carlo Method and Related Problems,” Nauka, Moskow (1971) (in Russian); German edition: “Die Monte Carlo Methode und Verwandte Fragen,” Oldenburg Verlag, Munchen (1975).
3. Optimum Biasing of Integral Equations in Monte Carlo Calculations