@article{10_4064_aa163_2_3,
     author = {Vsevolod F. Lev and Rom Pinchasi},
     title = {Solving $a\pm b=2c$ in elements of finite sets},
     journal = {Acta Arithmetica},
     pages = {127--140},
     publisher = {mathdoc},
     volume = {163},
     number = {2},
     year = {2014},
     doi = {10.4064/aa163-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa163-2-3/}
}