(1994-2003 )

(1994-2003 ) - 1

(1994-2003 ) - 0

- 1

(1994-2003 )

1. V. I. Zhegalov and E. A. Utkina, On a fourth-order partial differential equation with three independent variables. Differential Equations 38 (2002), No. 1, 99-103.

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