4Cengiz Dundar, Ilker Fatih Kara. Three dimensional analysis of reinforced concrete frames with cracked beam and column elements[J]. Engineering Structures, 2007, 29: 2 262-2 273.
5Tserpes K I, Papanikos E Finite element modeling of single-walled carbon nanotubes[J]. Composite, 2005, 36: 468-477.
