On undecidability of sensitivity of reversible cellular automata. - Ville Lukkarila (Automata, 2008)

Some Undecidable Dynamical Properties for One-Dimensional Reversible Cellular Automata. - Jarkko Kari; Ville Lukkarila (Algorithmic Bioprocesses, 2009)

The 4-way deterministic tiling problem is undecidable. - Ville Lukkarila (Theor. Comput. Sci., 2009)

Sensitivity and Topological Mixing are Undecidable for Reversible One-dimensional Cellular Automata. - Ville Lukkarila (J. Cell. Autom., 2010)