@article{10_14708_cm_v27i2_6206,
     author = {A. Iwan and C. Wowk},
     title = {Basic part of {Witt} rings of elementary type},
     journal = {Commentationes Mathematicae},
     pages = { 257--263},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {1988},
     doi = {10.14708/cm.v27i2.6206},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v27i2.6206/}
}