Linked from
The 10 pages that link to Double stop, each with the reason it gives.
ViolinBroader topic: The violin can sound two strings together to create harmony or fuller textures.
Niccolò PaganiniRelated: His works combine double stops with rapid passagework and wide leaps.
Cello concertoRelated: Double stops let a solo cellist suggest harmony without orchestral support.
Henryk WieniawskiRelated: They contribute to the chords and technical display in his solo writing.