Rights:
© 1997 American Physical Society (APS). This is the accepted version of the following article: Åström, Jan & Kellomäki, Markku & Alava, Mikko J. & Timonen, Jussi. 1997. Propagation and kinetic roughening of wave fronts in disordered lattices. Physical Review E. Volume 56, Issue 5. 6042-6049. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.56.6042, which has been published in final form at http://journals.aps.org/pre/abstract/10.1103/PhysRevE.56.6042.