@article{PFMT_2019_3_a7,
     author = {J. Zhao and Y. Song and L. Wang and I. V. Semchenko and A. L. Samofalov},
     title = {Design of a multi-layer structure of a bifilar helical antenna},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {49--52},
     publisher = {mathdoc},
     number = {3},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2019_3_a7/}
}