A site run by Aaron Gross, a son-in-law of Nyiregyházi's late cousin Henry Fried.
The official site of the International Ervin Nyiregyházi Foundation
Ervin Nyiregyhazi Appreciation page
Music scores and MIDI transcriptions of some of the childhood compositions in the Revecz's book
A site run by a pianist Michael Sayers.
"Lost Genius" is available from this link.
International Piano Archive at Maryland
University of Creation, Art, Music & Social Work
Takasaki College of Music. Current president, Daitetsu Koike, invited Nyiregyházi to Japan.
Kakuyu Sekikawa's HP
A Japanese page run by Kakuyu Sekikawa, a biwa player who invited Nyiregyházi to Japan.
They financially supported Nyiregyházi in late 70's, generatung two Masterworks LPs.