Kertzinger, August (Augustin)
Sonata ab: 11: | 2. Violini: | 4: Violae | 1: Gamba | 4: Tromboni | Con Violone et organo: | Auth: R: D: Augus: Kertzinger
In the central section, the viola da gamba has solo passages together with the two violins, while in the tutti it realises the basso continuo.
Marc Strümper, Die Viola da gamba am Wiener Kaiserhof, Tutzing, Schneider, 2004, pp. 313-314