(en) The interactions inside the (bisemi)particles are envisaged from two points of view: The first approach, based on the reducible representations of algebraic bilinear semigroups, allows to describe explicitly the interactions between (bisemi)particles by means of gravito-electro-magnetic fields of interaction while the second approach,based on the consideration of (bi)connections, leads to Maxwell extended equations involving the gravitational field. Comment: 58 pages