@article{ITA_2012__46_3_451_0,
     author = {Dong, Jing and Liu, Qinghui},
     title = {Undecidability of infinite post correspondence problem for instances of size 8},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {451--457},
     publisher = {EDP-Sciences},
     volume = {46},
     number = {3},
     year = {2012},
     doi = {10.1051/ita/2012015},
     mrnumber = {2981678},
     zbl = {1257.03069},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ita/2012015/}
}