@article{IM_1986__83_143328,
     author = {Pawel Glowacki},
     title = {Stable semi-groups of measures as commutative approximate identities on non-graded homogeneous groups.},
     journal = {Inventiones mathematicae},
     pages = {557--582},
     publisher = {mathdoc},
     volume = {83},
     year = {1986},
     zbl = {0595.43006},
     url = {http://geodesic.mathdoc.fr/item/IM_1986__83_143328/}
}