@InCollection{RCA:19,
author = {Reinert, B. and Madlener, K. and Mora, T.},
title = {A Note on Nielsen Reduction and Coset Enumeration},
year = "1998",
month = "February",
  booktitle = "Reports On Computer Algebra",
  publisher = "Centre for Computer Algebra, University of Kaiserslautern",
  number = 19,
  note ="Online available at http://www.mathematik.uni-kl.de/~zca"
}