1. Das absolute Tonbewusstsein;Abraham;Internationale Musikgesellschaft; Sammelbande,1901
2. Extreme limits of pitch discrimination with higher tones;Andreyev;Journal of Comparative Psychology,1934
3. Various types of absolute pitch;Bachem;Journal of the Acoustical Society of America,1937
4. The genesis of absolute pitch;Bachem;Journal of the Acoustical Society of America,1940
5. Chroma fixation at the ends of the musical frequency scale;Bachem;Journal of the Acoustical Society of America,1948