found: Casalquartett. 20th century Swiss string quartets [SR] p2006:label (casalQUARTETT Zurich) insert (casalQUARTETT Zurich; casalQUARTETT; cQ; German-Swiss quartet, founded 1995; Markus Fleck (or Rachel R. Späth), Daria Zappa, violins, Dominik Fischer (or Markus Fleck), viola, Andreas Fleck, cello)
found: casalQuartett WWW site, Feb. 2, 2007:main page (logo shows "casal" on upper line, with "QUARTETT" below) biography (casalQUARTETT; cQ; Rachel Späth, Daria Zappa, violins, Markus Fleck, viola, Andreas Fleck, violoncello)
found: La isla y el mar, ℗2019:label (Casal Quartet) insert (Casal Quartett; casalQuartet; founded 1996; members: Felix Froschhammer, Rachel Späth, violins, Markus Fleck, viola, Andreas Fleck, cello)
