@article{10_4064_fm_64_2_181_188,
     author = {W. Holszty\'nski},
     title = {On the composition and products of universal mappings},
     journal = {Fundamenta Mathematicae},
     pages = {181--188},
     publisher = {mathdoc},
     volume = {64},
     number = {2},
     year = {1969},
     doi = {10.4064/fm-64-2-181-188},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-64-2-181-188/}
}