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 R. A. Horn and C. R. Johnson, Matrix Analysis. Cambridge, U.K:
Cambridge Univ. Press, 1985, pp 176-177, 192-193.
 Sony Akkarakkaran and P. P. Vaidyanathan, "Filter bank optimization
with convex objectives and the optimality of principal component
forms", IEEE Trans. SP. vol 49 no.1 pp 100-114, Jan 2001
 Ahmet Kirac and P. P. Vaidyanathan, "Theory and design of optimum
FIR compaction filters," IEEE Trans. Signal Processing, vol. 46, no.
4, pp. 903-919, Apr. 1998
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globally optimal FIR energy compaction filters", IEEE Trans. Signal
Processing, vol.48, no. 10, pp. 2822-2838, Oct. 2000
 Andre Thacenko and P. P. Vaidyanathan, " Iterative gradient technique
for the design of least squares optimal FIR magnitude squared Nyquist
filters", IEEE Int. Conf. On Acoust., Speech, and Signal
 Yuan-Pei Lin and P. P. Vaidyanathan , "An iterative approach to the
design of IFIR matched filters", International Symposium on Circuits
and Systems, June 9-12, 1997,Hong Kong
 V.P.Sathe and P. P. Vaidyanathan , "Effects of Multirate systems on the
statistical properties of random signals", IEEE Transaction on Signal
processing, vol.41, No.1, January 1993, 131-146.
 P. P. Vaidyanathan and Sony Akkarakkaran, "A review of the theory and
applications of optimal subband and transform coders", Applied and
computational harmonic analysis, 10,254- 289(2001).
 T Q Nguyen, "The design of arbitrary FIR digital filters using the
Eigenfilter method", IEEE Trans. Signal processing, 41(3):1128-1139,
 P. P. Vaidyanathan, T Q Nguyen, Zinnur Doganata, Tapio Saramaki,
"Improved Technique for Design of Perfect Reconstruction FIR QMF
Banks with Lossless Polyphase Matrices", IEEE trans. on ASSP,vol
37,no 7 1989
 P. P. Vaidyanathan, "Eigenfilters: A New Approach to Least-Squares
FIR Filter Design and Applications Including Nyquist Filters", IEEE
trans. on CAS, Vol 34, no.1,1987.