1. Markov Chains;Freedman,1971
2. Percolation processes: lower bound for the critical probability;Hammersley;Ann. Math. Statist.,1957
3. Comparison of atom and bond percolation processes;Hammersley;J. Math. Phys.,1961
4. A lower bound for the critical probability in a certain percolation process;Harris,1960
5. Statistical Mechanics;Hill,1956