1. H. Akaike, Canonical correlation analysis of time series and the use of an information criterion, in System Identification and Case Studies, R. K. Mehra and D. G. Lainiotis, Eds., Mathematics in Science and Engineering, Vol. 126, Academic Press, New York, 1976, pp. 27?96.
2. D. G. Arnoson and J. Serrin, Local behaviour of quasilinear parabolic equations, Arch. Rational Mech. Anal. 25, 1967, 81?122.
3. S. Bernstein, Sur les liasons entre les grandeurs aleatories, Verh. des intern. Mathematikerkongr., Vol. 1, Zurich, 1932, pp. 288?309.
4. A. Beurling, An automorphism of product measures, Ann. of Math. 72, 1960, 189?200.
5. R. M. Blumenthal and R. K. Getoor, Markov Processes and Potential Theory, Academic Press, New York, 1968.