@incollection(TimeVaryingP,
 author       = "A. Alhazov and R. Freund and H. Heikenw{\"a}lder and M. Oswald and {\relax Yu}. Rogozhin and S. Verlan",
 year         = "2013",
 title        = "{Sequential P systems with regular control}",
 editor       = "E. Csuhaj-Varj{\'u} and M. Gheorghe and G. Rozenberg and A. Salomaa and {\relax Gy}. Vaszil",
 booktitle    = "{Membrane Computing - 13th International Conference, CMC 2012, Budapest, Hungary, August 28-31, 2012, Revised Selected Papers}",
 series       = "LNCS",
 volume       = "7762",
 publisher    = "Springer",
 pages        = "112--127",
 doi          = "10.1007/978-3-642-36751-9{\_}9",
)
@book(DassowPaun1989,
 author       = "J. Dassow and {\relax Gh}. P\u {a}un",
 year         = "1989",
 title        = "{Regulated Rewriting in Formal Language Theory}",
 series       = "EATCS Monographs in Theoretical Computer Science",
 volume       = "18",
 publisher    = "Springer",
 doi          = "10.1007/978-3-642-74932-2",
)
@incollection(Freund2013,
 author       = "R. Freund",
 year         = "2013",
 title        = "{Purely catalytic P systems: two catalysts can be sufficient for computational completeness}",
 editor       = "A. Alhazov and S. Cojocaru and M. Gheorghe and {\relax Yu}. Rogozhin",
 booktitle    = "{CMC14 Proceedings -- The 14th International Conference on Membrane Computing, Chi\c {s}in\u {a}u, August 20--23, 2013}",
 publisher    = "Institute of Mathematics and Computer Science, Academy of Sciences of Moldova",
 pages        = "153--166",
)
@article(Freundetal2005,
 author       = "R. Freund and L. Kari and M. Oswald and P. Sos\'{\i }k",
 year         = "2005",
 title        = "{Computationally universal P systems without priorities: two catalysts are sufficient}",
 journal      = "Theoretical Computer Science",
 volume       = "330",
 pages        = "251--266",
 doi          = "10.1016/j.tcs.2004.06.029",
)
@incollection(FreundPaun2013,
 author       = "R. Freund and {\relax Gh}. P\u {a}un",
 year         = "2013",
 title        = "{Universal P systems: one catalyst can be sufficient}",
 editor       = "L. Valencia-Cabrera and M. Garc\'{i}a-Quismondo and L.F. Macías-Ramos and M.A. {Mart\'{i}nez-del-Amor} and {\relax Gh}. P\u {a}un and A. {Riscos-N\'{u}\~{n}ez}",
 booktitle    = "{Proceedings 11th Brainstorming Week on Membrane Computing, Sevilla, 4--8 February 2013}",
 publisher    = "Fenix Editora, Sevilla",
 pages        = "81--96",
)
@article(MiguelMario,
 author       = "M.A. Guti\'{e}rrez-Naranjo and M.J. P\'{e}rez-Jim\'{e}nez",
 year         = "2013",
 title        = "{P systems with membrane creation and rule input}",
 note         = "To appear",
)
@article(KrishnaAndrei,
 author       = "S.N. Krishna and A. P\u {a}un",
 year         = "2004",
 title        = "{Results on catalytic and evolution-communication P systems}",
 journal      = "New Generation Computing",
 volume       = "22",
 pages        = "377--394",
 doi          = "10.1007/BF03037288",
)
@incollection(control,
 author       = "K. Krithivasan and {\relax Gh}. P\u {a}un and A. Ramanujan",
 year         = "2013",
 title        = "{On controlled P systems}",
 editor       = "L. Valencia-Cabrera and M. Garc\'{i}a-Quismondo and L.F. Macías-Ramos and M.A. {Mart\'{i}nez-del-Amor} and {\relax Gh}. P\u {a}un and A. {Riscos-N\'{u}\~{n}ez}",
 booktitle    = "{Proceedings 11th Brainstorming Week on Membrane Computing, Sevilla, 4--8 February 2013}",
 publisher    = "Fenix Editora, Sevilla",
 pages        = "137--151",
)
@inproceedings(MadhuKamala,
 author       = "K. Krithivasan M. Mutyam",
 year         = "2001",
 title        = "P systems with membrane creation: universality and efficiency",
 editor       = "M. Margenstern and {\relax Yu}. Rogozhin",
 booktitle    = "Proceedings MCU 2001",
 series       = "Lecture Notes in Computer Science",
 volume       = "2055",
 publisher    = "Springer",
 pages        = "276--287",
 doi          = "10.1007/3-540-45132-3{\_}19",
)
@book(Minsky1967,
 author       = "M.L. Minsky",
 year         = "1967",
 title        = "{Computation: Finite and Infinite Machines.}",
 publisher    = "Prentice Hall, Englewood Cliffs, New Jersey",
)
@article(deltatau,
 author       = "{\relax Gh}. P\u {a}un",
 year         = "2000",
 title        = "{Computing with membranes - a variant}",
 journal      = "International Journal of Foundations of Computer Science",
 volume       = "11",
 number       = "1",
 pages        = "167--182",
 doi          = "10.1142/S0129054100000090",
)
@article(cell1,
 author       = "{\relax Gh}. P\u {a}un",
 year         = "2003",
 title        = "{Computing with membranes}",
 journal      = "Journal of Computer and System Sciences",
 volume       = "61",
 pages        = "108--143",
 doi          = "10.1006/jcss.1999.1693",
)
@book(handMC,
 editor       = "{\relax Gh}. P\u {a}un and G. Rozenberg and A. Salomaa",
 year         = "2010",
 title        = "{The Oxford Handbook of Membrane Computing}",
 publisher    = "Oxford University Press",
)
@book(HandbookFormalLanguages1997,
 editor       = "G. Rozenberg and A. Salomaa",
 year         = "1997",
 title        = "{Handbook of Formal Languages, 3 volumes}",
 publisher    = "Springer",
)
@misc(webP,
 author       = "{\relax The P Systems Website}",
 url          = "{http://ppage.psystems.eu}",
)