E. J. Kreul

Stereotaxic surgery for parkinsonism. A method of evaluation and clinical results.

E. Wright, B. Feinstein, W. W. Alberts, 1961, Journal of neurosurgery.

A Proposed Clinical Test of Speech Discrimination

Karl D. Kryter, K. D. Kryter, Donald W. Bell, 1968 .

Speech Intelligibility for Interaural Alternated Speech With and Without Intervening Noise for Words and Nonsense

E. J. Kreul, 1971, Language and speech.

Neuromuscular control examination (NMC) for Parkinsonism: vowel prolongations and diadochokinetic and reading rates.

E. J. Kreul, 1972, Journal of speech and hearing research.

Factors affecting speech discrimination test difficulty.

D. W. Bell, J C Nixon, D W Bell, 1969, Journal of speech and hearing research.