@article{MOMA_1992__114_1_178593,
     author = {Qing Zhang and Thomas Ward},
     title = {The {Abramov-Rokhlin} {Entropy} {Addition} {Formula} for {Amenable} {Group} {Actions.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {317--330},
     publisher = {mathdoc},
     volume = {114},
     number = {1},
     year = {1992},
     zbl = {0764.28014},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1992__114_1_178593/}
}