@article{CM_1962-1964__15__64_0,
     author = {Zulauf, A.},
     title = {On the number of representations of an integer as a sum of primes belonging to given arithmetical progressions},
     journal = {Compositio Mathematica},
     pages = {64--69},
     publisher = {Kraus Reprint},
     volume = {15},
     year = {1962-1964},
     mrnumber = {137690},
     zbl = {0099.03103},
     language = {en},
     url = {http://www.numdam.org/item/CM_1962-1964__15__64_0/}
}