@article{AUCMP_2003__44_2_a0,
     author = {Bernard, Otto},
     title = {On contexts of direct products, ordinal sums and ordinal products},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {3--15},
     publisher = {mathdoc},
     volume = {44},
     number = {2},
     year = {2003},
     mrnumber = {2101897},
     zbl = {1123.06003},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_2003__44_2_a0/}
}