@TechReport{Laubsch_Nerbonne:1991,
      AUTHOR = {Laubsch, Joachim and Nerbonne, John},
      TITLE = {An Overview of NLL},
      YEAR = {1991},
      MONTH = {July},
      ADDRESS = {Palo Alto},
      TYPE = {Technical Report},
      INSTITUTION = {Hewlett-Packard Laboratories}
}