Fugue for 2 violoncells in B-flat major G 73 Fugue for 2 violoncells in B-flat major G 73/3 Fugue for 2 violoncells in A major G 73 Fugue for 2 violoncellos in F major G 73 Fugue for 2 violoncells in A major G 73/5 Fugue for 2 violoncellos in F major G 73/2 Duet for 2 violins in A major WoO 34 Concerto for violin & oboe in B-flat major, RV 579 Concerto No. 9 for 2 violins in B-flat major, RV 530 Concerto for violin in B-flat major, RV 363