@article{10_4064_sm_124_2_173_178,
     author = {B. Kami\'nski and   and  },
     title = {On extremal and perfect \ensuremath{\sigma}-algebras for $\ensuremath{\mathbb{Z}}^{d}$-actions on a {Lebesgue} space},
     journal = {Studia Mathematica},
     pages = {173--178},
     publisher = {mathdoc},
     volume = {124},
     number = {2},
     year = {1997},
     doi = {10.4064/sm-124-2-173-178},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-124-2-173-178/}
}