Three-loop HQET vertex diagrams for B0-(B)over-bar0 mixing

Three-loop vertex diagrams in HQET needed for sum rules for B-0-(B) over bar (0) mixing are considered. They depend on two residual energies. An algorithm of reduction of these diagrams to master integrals has been constructed. All master integrals are calculated exactly in d dimensions; their epsilon expansions are also obtained.