@article{PIM_1986_N_S_39_53_a6,
     author = {Milosz Michalski},
     title = {Branching {Extent} and {Spectra} of {Trees}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {35 },
     publisher = {mathdoc},
     volume = {_N_S_39},
     number = {53},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1986_N_S_39_53_a6/}
}