String Quartet in B flat major,Op.103 String Quartet in E flat major, op.109 string quartet in b flat major, k. 458 String Quartet in B flat major,op.67 String quartet in B-flat major, G 160 String Quartet in E flat major,op.20 no.1 String quartet No.12 in D flat major, op.133 String quartet No.9 in E flat major, op.117 string quartet in c sharp minor,op.131 String quartet in E-flat major, G 236