@inproceedings{NFM2012:LiBuGr,
 author = {Yuhui Lin and Alan Bundy and Gudmund Grov},
 title = {The Use of Rippling to Automate Event-B Invariant Preservation Proofs},
 booktitle = {Proceedings of the 4th  NASA Formal Methods Symposium (NFM 2012)},
 volume = {7226},
 editor = {Alwyn E. Goodloe and Suzette Person},
 location = {Norfolk, VA, USA},
 publisher = {Springer-Verlag},
 address = {Berlin, Heidelberg},
 pages = {231--236},
 month = {April},
 year = {2012}
}