ПОПОВ, Игорь Павлович.
 The deviation of the frequency of a spherical wave.
<strong>Radioengineering and telecommunication systems</strong>, [S.l.], n. 3, p. 72-76, jan. 2020.
ISSN 2221-2574. Available at: &lt;<a href="https://rts-md.mivlgu.ru/jornalRTS/article/view/128" target="_new">https://rts-md.mivlgu.ru/jornalRTS/article/view/128</a>&gt;. Date accessed: 01 aug. 2025.