Natural and Artificial Models in Computation and Biology : 5th International Work-Conference on the Interplay Between Natural and Artificial Computation, IWINAC 2013, Mallorca, Spain, June 10-14, 2013. Proceedings, Part I - José Manuel Ferrández Vicente, José Ramón Álvarez Sánchez, Félix Paz López, Fco. Javier Toledo Moreo ((Lecture Notes in Computer Science))