四重奏

String Quartet No. 4
Masa

Fuchs, Du hast die Gans gestohlen [score and parts]
as Ludwig van Beethoven could (possibly) have composed it

Patchwork
String Quartet No. 3

La Caleta
String Quartet No. 2

Summertime (string quartet (double bass ad libitum))
from Porgy and Bess

String Quartet G major Op. post. 161 D 887（パート譜）

Tango (string quartet)
arranged for string quartet by Wolfgang Birtel (2010)

Petite Suite
for String Quartet

Fuchs, Du hast die Gans gestohlen [Double Bass ad lib.]
as Ludwig van Beethoven could (possibly) have composed it

4 Tangos

From My Life - String Quartet no. 1 e minor（パート譜）
String Quartet no. 1

Träumerei op. 15/7 [string quartet (double bass ad libitum)]
from 'Scenes from Childhood'

Happy Birthday [string quartet (double bass ad libitum)]
A Five-course Birthday Dinner

Canto epico [score]
for String Quartet

String Quartet No. 2 [score]

Canto epico [set of parts]
for String Quartet

String Quartet No. 2 [set of parts]

Floraux
Tango

...called dusk II
for string quartet

Variationen über ein eigenes Kinderlied.