@article{SM_2021_212_4_a7,
     author = {K. M. Eminyan},
     title = {Hua {Loo-Keng's} problem for primes of a~special form},
     journal = {Sbornik. Mathematics},
     pages = {592--603},
     publisher = {mathdoc},
     volume = {212},
     number = {4},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2021_212_4_a7/}
}