1. Foreword

   • Carlos Martín-Vide
   • Gheorghe Păun

   Foreword Pages: 199 - 200

2. PX systems = P systems + X machines

   • Francesco Bernardini
   • Marian Gheorghe
   • Mike Holcombe

   OriginalPaper Pages: 201 - 213

3. Forbidding and enforcing in membrane computing

   • Matteo Cavaliere
   • Nataša Jonoska

   OriginalPaper Pages: 215 - 228

4. Array-rewriting P systems

   • Rodica Ceterchi
   • Madhu Mutyam
   • K.G. Subramanian

   OriginalPaper Pages: 229 - 249

5. Mathematical models of uncertainty with a regard to membrane systems

   • Adam Obtułowicz

   OriginalPaper Pages: 251 - 263

6. Complexity classes in models of cellular computing with membranes

   • Mario J. Péerez Jiménez
   • Álvaro Romero Jiménez
   • Fernando Sancho Caparrini

   OriginalPaper Pages: 265 - 285

7. The computational power of cell division in P systems: Beating down parallel computers?

   • Petr Sosík

   OriginalPaper Pages: 287 - 298

8. From Watson-Crick L systems to Darwinian P systems

   • Erzsébet Csuhaj-Varjú
   • Carlos Martín-Vide
   • Arto Salomaa

   OriginalPaper Pages: 299 - 318