Mobile : String quartet no. 3, 2011 con fuoco : String quartet no. 4, 2011 Ph(r)asen : String quartet no. 1, 2007 String quartet No. 3, 1971 Guggisberg-variationen : String quartet no. 2, 2008 String quartet no. 1 String quartet no. 2 String quartet no. 2 1955 string quartet no.1 string quartet no.2