Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Jetty Kleijn, Maciej Koutny. Membrane Systems with Qualitative Evolution Rules. Fundamenta Informaticae, 110(1-4):217-230, 2011. [doi]