

Three Duos for Violin and Cello Op.4 No. III composed by Joseph Reicha (1746-1795). Edition Eulenburg Zurich.
Applebaum, Beautiful Music for Two String Instruments. Books 1-4 for two violins, two violas, two cellos, and two double basses.
Handel, Chaconne in G for Violin and Viola. Editio Musica Budapest.
This work by Hanno Haag features complex and simple harmonies between the Violin and Viola parts.