@article{1028999182,
author = {Breusch, Robert},
title = {An asymptotic formula for primes of the form $4n+1$.},
journal = {Michigan Math. J.},
volume = {11},
number = {1},
year = {1964},
pages = { 311-315},
language = {en},
url = {http://dml.mathdoc.fr/item/1028999182}
}
Breusch, Robert. An asymptotic formula for primes of the form $4n+1$.. Michigan Math. J., Tome 11 (1964) no. 1, pp. 311-315. http://gdmltest.u-ga.fr/item/1028999182/