R. Freund, A. Alhazov, S. Ivanov:
"P Systems with Anti-Membranes";
Talk: CMC20, Curtea de Arges, Romania; 2019-08-05 - 2019-08-08; in: "Proceedings of the 20th Intern. Conf. on Membrane Computing CMC20", Gh. Paun (ed.); (2019), ISBN: 978-606-8493-76-3; 249 - 256.
https://publik.tuwien.ac.at/files/publik_282059.pdf