@conference {P89:Towards,
	title = {Towards Reversible MT Systems},
	booktitle = {Proceedings of the 2nd International MT Summit},
	year = {1989},
	address = {Munich},
	pdf = {http://rali.iro.umontreal.ca/rali/sites/default/files/publis/towards_reversible.ps},
	author = {Isabelle, P.}
}
