@article{10_4064_sm_110_1_53_64,
     author = {Artur Siemaszko},
     title = {On group extensions of 2-fold simple ergodic actions},
     journal = {Studia Mathematica},
     pages = {53--64},
     publisher = {mathdoc},
     volume = {110},
     number = {1},
     year = {1994},
     doi = {10.4064/sm-110-1-53-64},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-110-1-53-64/}
}