Gerding G., M., and A. France I. “Cryopreservation of the Nematode Beddingia (Deladenus) Siricidicola, Biological Control Agent of Sirex Wood Wasp”. Revista Bosque, vol. 26, no. 2, Aug. 2005, pp. 131-5, https://revistabosque.org/index.php/bosque/article/view/1002.