%0 Generic %D 2014 %T The Role of the Direction in Tissue P Systems with Cell Separation %A Luis F. Macías-Ramos %A Miguel A. Martínez-del-Amor %A Mario J. Pérez-Jiménez %A Agustín Riscos-Núñez %A Luis Valencia-Cabrera %P 185–199 %V 19 (2014) 1–4