Н. Р. Пирцхалава-Карпова, А. А. Карпов, Е. Е. Козловский, and М. Ю. Грищенко, “Protection of Spruce Forests from Outbreaks of Ips typographus (Review)”, Lesnoy Zhurnal, no. 4, pp. 55–67, Jul. 2021.