@article{10_1017_S001708950000608X,
     author = {Halberstam, H.},
     title = {Application of a method of {Szemeredi}},
     journal = {Glasgow mathematical journal},
     pages = {81--85},
     year = {1985},
     volume = {26},
     doi = {10.1017/S001708950000608X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000608X/}
}