Geometry of the trilogarithm and the motivic Lie algebra of a field
  We express the Aomoto trilogarithm explicitely via classical trilogarithm and investigate the algebraic-geometric structures behind this: different realuzations of the weight three motivic complexes.   Using this results we give an explicit motivic construction of the Grassmannian 4-logarithm and Borel regulator map for K_7(C). 
A.B. Goncharov