v.l.n.r.: Ulrike Zavelberg (Cello), Jana Andraschke (Viola), Martina Horejsi (Violine), Irmgard Zavelberg (Violine) Rubin Quartett Sizes: 150 × 150 / 300 × 123 / 768 × 314 / 1.024 × 419 / 3.462 × 1.417 v.l.n.r.: Ulrike Zavelberg (Cello), Jana Andraschke (Viola), Martina Horejsi (Violine), Irmgard Zavelberg (Violine)