@article{MS2_1968__22_166032,
     author = {Veikko Ennola},
     title = {On a {Theorem} of erd\"os and {Turan.}},
     journal = {Mathematica Scandinavica},
     pages = {75--80},
     year = {1968},
     volume = {22},
     zbl = {0174.33901},
     url = {http://geodesic.mathdoc.fr/item/MS2_1968__22_166032/}
}