Franquinho Aguiar, António & Cravo, Délia & Gonçalves, Ysabel: Sawflies and horntails of Madeira Archipelago (Hymenoptera: Symphyta), with the first records of two wasp species (Hymenoptera: Ibaliidae & Ichneumonidae) parasitizing Sirex noctilio (Fabricius, 1793). Entomologist’s Monthly Magazine, 28.7.2017, 153. vsk, s. 157–170. Artikkelin verkkoversio. Viitattu 31.1.2023. (englanniksi)