@article{MZ_1986__192_173719,
     author = {Paolo M. Soardi},
     title = {The {Resolvent} for {Simple} {Random} {Walks} on the {Free} {Product} of {Two} {Discrete} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {109--116},
     publisher = {mathdoc},
     volume = {192},
     year = {1986},
     zbl = {0608.60015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1986__192_173719/}
}