@article{10_4153_CMB_1989_028_6,
     author = {R\"ohl, Frank},
     title = {A {Remark} on the {Loewy-Series} of {Certain} {Hopf} {Algebras}},
     journal = {Canadian mathematical bulletin},
     pages = {190--193},
     year = {1989},
     volume = {32},
     number = {2},
     doi = {10.4153/CMB-1989-028-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-028-6/}
}