@article{CM_1956-1958__13__103_0,
     author = {Zulauf, Achim},
     title = {On sums and differences of primes and squares},
     journal = {Compositio Mathematica},
     pages = {103--112},
     publisher = {Kraus Reprint},
     volume = {13},
     year = {1956-1958},
     mrnumber = {91969},
     zbl = {0079.06601},
     language = {en},
     url = {http://www.numdam.org/item/CM_1956-1958__13__103_0/}
}