@article{MABA_1992_6_2_a2,
     author = {Zhikica Perovich},
     title = {Relatively {Complete} {2-Extensions} of {Boolean} {Algebras}},
     journal = {Mathematica balkanica},
     pages = {125},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1992},
     url = {http://geodesic.mathdoc.fr/item/MABA_1992_6_2_a2/}
}