@article{AUPO_1987_26_1_a0,
     author = {Van\v{z}urov\'a, Alena},
     title = {Double vector spaces},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {9--25},
     year = {1987},
     volume = {26},
     number = {1},
     mrnumber = {1033327},
     zbl = {0701.58004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1987_26_1_a0/}
}