@article{01924518, title = {A flat plane that is not the limit of periodic flat planes.}, journal = {Geometry \& Topology}, volume = {7}, year = {2003}, pages = {147-154}, doi = {10.2140/agt.2003.3.147}, zbl = {1042.20034}, language = {en}, url = {http://dml.mathdoc.fr/item/01924518} }
Wise, Daniel T. A flat plane that is not the limit of periodic flat planes.. Geometry & Topology, Tome 7 (2003) pp. 147-154. doi : 10.2140/agt.2003.3.147. http://gdmltest.u-ga.fr/item/01924518/