@article{10_14708_cm_v22i2_6024,
     author = {J. Kwiatkowski},
     title = {Non-singular isomorphism and weak isomorphism on the class of dynamical systems with discrete spectra},
     journal = {Commentationes Mathematicae},
     pages = { 275--293},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1981},
     doi = {10.14708/cm.v22i2.6024},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v22i2.6024/}
}