
In a letter of Schmidt-Rottluff from Dresden, 1906 to Emil Nolde; as quoted in Expressionism, de:Wolf-Dieter Dube; Praeger Publishers, New York, 1973, p. 32
Schmidt-Rottluff was one of the founders of Die Brücke and invited Emil Nolde to participate, and emphasized the group's spirit of experimentation which they recognized in Nolde's painting art