@article{10_4064_sm_99_1_11_21,
     author = {B. Kami\'nski},
     title = {Generators of perfect \ensuremath{\sigma}-algebras of $Z^{d}$-actions},
     journal = {Studia Mathematica},
     pages = {11--21},
     publisher = {mathdoc},
     volume = {99},
     number = {1},
     year = {1991},
     doi = {10.4064/sm-99-1-11-21},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-99-1-11-21/}
}