1. Bartels, P.H. Numerical evaluation of cytologic data IX. Search for data structure by principal components transformation. Anal. Quant. Cytol., 1981a, 3: 167?177.
2. Bartels, P.H. Numerical evaluation of cytologic data VIII. Computation of the principal components. Anal. Quant. Cytol., 1981b, 3: 83?90.
3. Berger, H. Ueber das Elektrenkephalogram des Menschen: I. Mitteilung. Arch. Psychiatr. Nervenkr., 1929, 87: 527?528.
4. Blinkhorn, S.F. and Hendrickson, D.E. Averaged evoked responses and psychometric intelligence. Nature, 1982, 295: 596?597.
5. Bruning, J. and Kintz, B. Computational Handbook of Statistics. Glenview, Ill.: Scott, Foresman and Co., 1977.