@article{GDZPPN002093928,
title = {Undecidable Tiling Problems in the Hyperbolic Plane.},
journal = {Inventiones mathematicae},
volume = {46},
year = {1978},
pages = {259-264},
zbl = {0354.50006},
url = {http://dml.mathdoc.fr/item/GDZPPN002093928}
}
Robinson, Raphael M. Undecidable Tiling Problems in the Hyperbolic Plane.. Inventiones mathematicae, Tome 46 (1978) pp. 259-264. http://gdmltest.u-ga.fr/item/GDZPPN002093928/