@article{10_4064_aa162_3_4,
     author = {Lilu Zhao},
     title = {Four squares of primes and powers of 2},
     journal = {Acta Arithmetica},
     pages = {255--271},
     publisher = {mathdoc},
     volume = {162},
     number = {3},
     year = {2014},
     doi = {10.4064/aa162-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa162-3-4/}
}