@article{MS2_1963__13_165854,
     author = {P. Erd\"os and J. Neveu and A. Renyi},
     title = {An {Elementary} {Inequality} {Between} the {Probabilities} of {Events.}},
     journal = {Mathematica Scandinavica},
     pages = {99--104},
     publisher = {mathdoc},
     volume = {13},
     year = {1963},
     zbl = {0129.31402},
     url = {http://geodesic.mathdoc.fr/item/MS2_1963__13_165854/}
}