@Article{KlaSch:DomainSpecLangRegSetsStringsTrees,
  author = 	 {Nils Klarlund and Michael I.\ Schwartzbach},
  title = 	 {A Domain-Specific Language for Regular Sets of Strings and Trees},
  journal = 	 {IEEE Transactions On Software Engineering},
  year = 	 {1999},
  OPTkey = 	 {},
  OPTvolume = 	 {25},
  OPTnumber = 	 {3},
  OPTpages = 	 {378-386},
  OPTmonth = 	 {},
  OPTnote = 	 {Extendend version of paper appearing in ``USENIX Conference on Domain-Specific Languages'', Santa Barbara, 1997},
  OPTannote = 	 {}
}