Vesa Halava, Mika Hirvensalo, Ronald de Wolf. Marked PCP is decidable. Theoretical Computer Science, 255(1-2):193-204, 2001. [doi]
@article{HalavaHW01,
title = {Marked PCP is decidable},
author = {Vesa Halava and Mika Hirvensalo and Ronald de Wolf},
year = {2001},
doi = {10.1016/S0304-3975(99)00163-2},
url = {http://dx.doi.org/10.1016/S0304-3975(99)00163-2},
researchr = {https://researchr.org/publication/HalavaHW01},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {255},
number = {1-2},
pages = {193-204},
}