@article{MZ_1995__218_4_174728,
     author = {Fausto Di Biase and Massimo A. Picardello},
     title = {The {Green} formula and {HP} {Spaces} on trees.},
     journal = {Mathematische Zeitschrift},
     pages = {253--272},
     publisher = {mathdoc},
     volume = {218},
     number = {4},
     year = {1995},
     zbl = {0819.31004},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__218_4_174728/}
}