References
The problems with Traditional Notation
Concerns with Traditional Notation Rhythm Notation
Gardner Read's book "Source Book of Proposed Music Notation Reforms"
the Music Notation Modernization Association (MNMA)
The Music Notation Project forum
The MuseScore website has a wide range of scores available for download; scores in the public domain are free while others require a membership subscription.
Klavarskribo Institute home page
Klavarskribo Documentary – Part 1 (1974)
Klavarskribo Documentary - Part 2 (1974)
Klavar Facebook group "Synthesia on paper!"
Klavar Facebook group Sheet Music and Software
Klavarskribo sheet music display app
Here is an Alternative Notation that is easy to read and solves all three of the main challenges of reading Traditional Notation.