@article{10_4064_fm_161_1_2_155_165,
     author = {Tadeusz Ko\'zniewski },
     title = {Splitting obstructions and properties of objects in the {Nil} categories},
     journal = {Fundamenta Mathematicae},
     pages = {155--165},
     publisher = {mathdoc},
     volume = {161},
     number = {1},
     year = {1999},
     doi = {10.4064/fm-161-1-2-155-165},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-161-1-2-155-165/}
}