@article {IOPORT.03564036,
    author       = {Sawyer, Stanley},
    title        = {Isotropic random walks in a tree.},
    year         = {1978},
    journal      = {Zeitschrift f\"ur Wahrscheinlichkeitstheorie und Verwandte Gebiete},
    volume       = {42},
    issn         = {0044-3719},
    pages        = {279-292},
    publisher    = {Springer-Verlag, Berlin},
    doi          = {10.1007/BF00533464},
    identifier   = {03564036},
}