@article{10_4064_aa161_2_2,
     author = {Th\'ai Ho\`ang L\^e and Yu-Ru Liu},
     title = {On sets of polynomials whose difference set
 contains no squares},
     journal = {Acta Arithmetica},
     pages = {127--143},
     publisher = {mathdoc},
     volume = {161},
     number = {2},
     year = {2013},
     doi = {10.4064/aa161-2-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa161-2-2/}
}