Percolation on dual lattices with <i>k</i>-fold symmetry.

Béla Bollobás Oliver Riordan Percolation on dual lattices with <i>k</i>-fold symmetry. 463-472 2008 32 Random Struct. Algorithms 4 http://dx.doi.org/10.1002/rsa.20205 db/journals/rsa/rsa32.html#BollobasR08