@InCollection{RCA:12,
author = {Bachmann, O. and Gray, S. and Sch\"{o}nemann, H.},
title = {{MP Prototype Specification}},
year = "1997",
month = "Dec",
  booktitle = "Reports On Computer Algebra",
  publisher = "Centre for Computer Algebra, University of Kaiserslautern",
  number = 12,
  note ="Online available at http://www.mathematik.uni-kl.de/~zca"
}