1. Energy theorems and structural analysis;Argyris,1960
2. Matrix methods in elastomechanics;Pestel,1963
3. Theory of matrix structural analysis;Przemieniecki,1968
4. Matrix analysis of framed structures;Weaver,1965
5. 3D-beam element with continuous variation of the cross-sectional area;Murin;Comput Struct,2002