@article{GDZPPN002292173,
title = {Tag Systems and Lag Systems.},
journal = {Mathematische Annalen},
volume = {152},
year = {1963},
pages = {65-74},
zbl = {0131.24602},
url = {http://dml.mathdoc.fr/item/GDZPPN002292173}
}
Wang, H. Tag Systems and Lag Systems.. Mathematische Annalen, Tome 152 (1963) pp. 65-74. http://gdmltest.u-ga.fr/item/GDZPPN002292173/