Tractatus figurarum /

Published 1989

Notation Neuer Musik /

Published 1965

Hudobná paleografia /

by Mokrý, Ladislav, 1932-2000
Published 1957

Geschichte der Notenschrift /

by Diettrich-Kalkhoff, Franz
Published 1907

Der musikalische Rhythmus als Erkenntnisquelle /

by Becking, Gustav, 1894-1945
Published 1928

Semiologia gregoriana /

by Cardine, Eugène, 1905-1988
Published 1968