1. Subgroup decomposition method
2. Consistent generalized energy condensation theory
3. Roskoff N., Walters W., Haghighat A., Yi C., Sjoden G., PHYSOR (2014), accepted
4. Han C.Y., Shin C., Kim H.C., Kim J.K., Messaoudi N., B.C. Na, NEA/NSC/DOC(2004)