@article{10_4064_aa_15_1_85_90,
     author = {P. Erd\"os and E. Szemer\'edi},
     title = {On a problem of {P.} {Erdos} and {S.} {Stein}},
     journal = {Acta Arithmetica},
     pages = {85--90},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1968},
     doi = {10.4064/aa-15-1-85-90},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-15-1-85-90/}
}