@article{10_4064_fm_56_1_107_113,
     author = {W. Zawadowski},
     title = {On regular extensions of operator systems.},
     journal = {Fundamenta Mathematicae},
     pages = {107--113},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {1964},
     doi = {10.4064/fm-56-1-107-113},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-56-1-107-113/}
}