Simeon Pironkoff, Krassimir Sterev, Wu Wei, Musica Nova Sofia Ensemble, Dragomir Yossifov, Trio AMOS – Skin Double - Works With Accordion & Quarter-Tone Accordion (2017, CD) - Discogs
Lore Amenabar Larrañaga: Quarter-Tone Accordion | Royal Academy of Music
Quarter tone - Wikipedia
24 Preludes Op. 22 by Ivan Wyschnegradsky » Piano Sheet Music
A full symphonic concerto for quarter-tone accordion and orchestra is not something you come around every day. The first and hopefully not the last time... | By Bjarke Mogensen - accordionist | Facebook
Accordion - Wikiwand
Accordion - Wikiwand
Coming to Métier: Music for Quarter-Tone Accordion | Divine Art Recordings
Concerto Accordion | Accordions International
Quarter tone - Wikipedia
Nader El Shaer demonstrates a quarter-tone accordion - YouTube
Quarter Tone Accordion / Accordéon à quarts de ton - YouTube
Quarter-Tone Accordion: New Music Through a New Instrument - YouTube