@article{10_4064_aa156_1_1,
     author = {P\'eter P\'al Pach},
     title = {The {Ramsey-type} version of a problem of
 {Pomerance} and {Schinzel}},
     journal = {Acta Arithmetica},
     pages = {1--5},
     publisher = {mathdoc},
     volume = {156},
     number = {1},
     year = {2012},
     doi = {10.4064/aa156-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa156-1-1/}
}