@article{10_4064_am_15_1_1_5,
     author = {A. Korzeniowski and A. Opawski},
     title = {Bounds for reliability in the {NBU,} {NWU} and {NBUE,} {NWUE} classes},
     journal = {Applicationes Mathematicae},
     pages = {1--5},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1976},
     doi = {10.4064/am-15-1-1-5},
     zbl = {0333.60085},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-15-1-1-5/}
}