1. P. P. Kozak, ?Representing multiple Wiener integrals in a space of continuous functions of several variables by means of nonlinear change of variables,? Ukr. Mat. Zh.,30, No. 6, 738?748 (1978).
2. R. H. Cameron and W. T. Martin, ?The orthogonal development of nonlinear functionals in series of Fourier-Hermite functionals,? Ann. Math.,48, No. 2, 385?392 (1947).
3. J. Yeh, ?Orthogonal development of functionals and related theorems in the Wiener space of functions of two variables,? Pac. J. Math.,13, No.4, 1427?1437 (1963).
4. T. Tobias, ?The mean square approximation of linear functionals,? Izv. Akad. Nauk ÉstSSR, Ser. Fiz. Mat. Tekh. Nauk, No. 1, 70?82 (1964).
5. I. M., Koval'chik, ?A multiple continuous integral in a space of functions of two variables,? Dopov. Akad. Nauk Ukr. RSR, Ser. A, No. 7, 604?608 (1972).