@article{10_4064_cm_1_3_199_202,
     author = {Edward Marczewski},
     title = {Concerning the symmetric difference in the theory of sets and in {Boolean} algebras},
     journal = {Colloquium Mathematicum},
     pages = {199--202},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1947},
     doi = {10.4064/cm-1-3-199-202},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-1-3-199-202/}
}