1. Editorial: Viewpoint

   • Lee A. Segel

   EditorialNotes Pages: 415 - 415

2. The multiple codes of nucleotide sequences

   • E. N. Trifonov

   Viewpoint Pages: 417 - 432

3. Description of the birch leaf roller's incisions for different leaves

   • Gábor Horváth

   OriginalPaper Pages: 433 - 447

4. Velocity distribution on the membrane of a tank-treading red blood cell

   • Si-shen Feng
   • Richard Skalak
   • Shu Chien

   OriginalPaper Pages: 449 - 465

5. Mathematical formulation and studies of the risk parameters involved in HIV transmission

   • Sonja Sandberg
   • Tamara E. Awerbuch

   OriginalPaper Pages: 467 - 474

6. Some applications of theP-V relation to the study of left ventricular performance

   • Rachad M. Shoucri
   • Jacques R. Rouleau
   • Gilles R. Dagenais

   OriginalPaper Pages: 475 - 484

7. A mathematical model for cell sorting, migration and shape in the slug stage ofDictyostelium discoideum

   • Tamiki Umeda

   OriginalPaper Pages: 485 - 500

8. Resilience and local stability in a nutrient-limited resource-consumer system

   • H. Nakajima
   • D. L. DeAngelis

   OriginalPaper Pages: 501 - 510

9. Centrifugal-order distributions in binary topological trees

   • J. van Pelt
   • R. W. H. Verwer
   • H. B. M. Uylings

   OriginalPaper Pages: 511 - 536

10. Book reviews

    • G. B. Ermentrout
    • Steven H. Strogatz
    • Jeffrey C. Long

    BookReview Pages: 537 - 544

11. Announcement

    Announcement Pages: 545 - 546

12. Editorial: Software survey section

    EditorialNotes Pages: I - IV