@article{BollobasRiordan,
 author = {Bollob\'{a}s, B{\'e}la and Riordan, Oliver},
 title = {A Short Proof of the Harris-Keston Theorem},
 journal = {Bull. London Math. Soc.},
 issue_date = {2006},
 volume = {38},
 month = aug,
 year = {2006},
 pages = {470-484},
} 
