1. Editorial

   • N.K. Bose Editor-in-Chief

   EditorialNotes Pages: 231 - 231

2. A 2-D systems approach to river pollution modelling

   • Ettore Fornasini

   OriginalPaper Pages: 233 - 265

3. Structure theorems for nonlinear systems

   • Irwin W. Sandberg

   OriginalPaper Pages: 267 - 286

4. Convergence properties of Gauss-Newton iterative algorithms in nonlinear image restoration

   • M. E. Zervakis
   • A. N. Venetsanopoulos

   OriginalPaper Pages: 287 - 318

5. Realization of 2-D denominator-separable digital filter transfer functions using complex arithmetic

   • D. Raghuramireddy
   • R. Unbehauen

   OriginalPaper Pages: 319 - 336

6. Convex combinations of G-stable polynomials

   • Marek K. Solak

   OriginalPaper Pages: 337 - 343