@Book{		  Paun:DNA.Splicing.computing,
  author       = {Gheorghe P\u{a}un},
  title        = {Computability of the {DNA} and cells. Splicing and
                  membrane computing},
  publisher    = {SBEB Publishing},
  year         = {2008},
  address      = {Choundrant, Louisiana},
}

@Book{		  Frisco:Cells-Advances-in-Membrane-Computing,
  author       = {Pierluigi Frisco},
  title        = {Computing with Cells. Advances in Membrane Computing},
  publisher    = {Oxford University Press},
  year         = {2008},
}

@book{Freund:LNCS3850:2006,
  author       = {R. Freund and Gh. Paun and G. Rozenberg and A. Salomaa},
  title        = {Membrane Computing},
  booktitle    = {International Workshop, WMC6, Vienna, Austria, 2005, Selected and Invited
                  Papers},
  year         = {2006},
  publisher    = {Springer-Verlag},
  series       = {LNCS 3850},
}

@book{Paun:Membrane_computing:Springer:2002,
  author       = {Gheorghe P{\u a}un},
  title        = {Membrane Computing. {A}n Introduction},
  publisher    = {Springer-Verlag},
  year         = {2002},
  address      = {Berlin},
  isbn         = {3-540-43601-4},
  url          = {http://ppage.psystems.eu/uploads/9/9d/VolumeContents_PaunBook.pdf},
}

@book{Perez_Jimenez:Teoria_de_la_complejidad_en:Kronos:2002,
	author={Mario J. P{\'e}rez-Jim{\'e}nez and Alvaro Romero-Jim{\'e}nez and Fernando Sancho-Caparrini},
	title={Teor{\'i}a de la complejidad en modelos de computaci{\'o}n celular con membranas},
	publisher={Kronos Editorial},
	year={2002},
	address={Sevilla},
	isbn={84-86273-57-9}
}

@book{Perez_Jimenez:Computacion,
	author={Mario J. P{\'e}rez-Jim{\'e}nez and Fernando Sancho-Caparrini},
	title={Computaci{\'o}n celular con membranas: {U}n modelo no convencional},
	publisher={Kronos Editorial},
	year={2002},
	address={Sevilla},
	isbn={84-86273-52-8}
}