@article{IM_1985__80_143229,
     author = {D.W. Masser and G. W\"ustholz},
     title = {Zero estimates on group varieties {II.}},
     journal = {Inventiones mathematicae},
     pages = {233--268},
     publisher = {mathdoc},
     volume = {80},
     year = {1985},
     zbl = {0564.10041},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__80_143229/}
}