@article{UMJ_2017_3_2_a10,
     author = {Viktor P. Zastavnyi},
     title = {Positive definite functions and sharp inequalities for periodic functions},
     journal = {Ural mathematical journal},
     pages = {82--99},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UMJ_2017_3_2_a10/}
}