@INPROCEEDINGS{cssmp92,
  AUTHOR = "C. Schoebel",
  TITLE = "Classification of Real n-Dimensional Lie Algebras with a
           Low-Dimensional Derived Algebra",
  BOOKTITLE = "Proc. {Symposium on Mathematical Physics} '92",
  YEAR = 1993}
  
@ARTICLE{ntz-preprint27/92,
  AUTHOR = "F. Schoebel",
  TITLE = "The Symbolic Classification of Real Four-Dimensional Lie Algebras",
  BOOKTITLE = "NTZ-Preprint Nr.27/92",
  PUBLISHER = "Universitaet Leipzig",
  ADDRESS = "Leipzig",
  YEAR = 1992}
  
@ARTICLE{mmpreprint1979,
  AUTHOR = "M.A.H. MacCallum",
  TITLE = "On the Classification of the Real four-dimensional Lie Algebras",
  BOOKTITLE = "Preprint, Queen Mary College",
  PUBLISHER = "Queen Mary College",
  ADDRESS = "London",
  YEAR = 1979}
