[1] Bezuidenhout C, Grimmett G. The critical contact process dies out. Ann Probab, 1990, 18: 1462-1482

[2] Pemantle R. The contact process on trees. Ann Probab, 1992, 20: 2089-2116

[3] Stacy A M. The existence of an intermediate phase for contact process on trees. Ann Probab, 1996, 24:
1711-1726

[4] Zhang Y. The complete convergence theorem of the contact process on trees. Ann Probab, 1996, 24:
1408-1443

[5] Salzano M, Schonmann R H. A new proof that for the contact process on homogenous trees local survive
implies complete convergence. Ann Probab, 1998, 26: 1251-1258

[6] Liggett T M. Interacting Partical Systems. New York: Springer Verlag, 1985

[7] Salzano M, Schonmann R H. The second lowest extremal invariant measure of the contact process. Ann
Probab, 1997, 25: 1846-1871

[8] Durrett R. Probability: Theory and examples. Menlo Park, CA: Wadsworth and Brooks Cole, 1991