Soares, A.O. & Borges, I. (2023) Novius cardinalis (Mulsant, 1850). Guia Prático da Fauna Terrestre dos Açores (ed. by R. Gabriel and P.A.V. Borges), 190-191. 2nd edition. Instituto Açoreano da Cultura, Angra do Heroísmo. ISBN:978-989-8225-82-5
António Onofre Costa Miranda SoaresIsland Biodiversity, Biogeography & Conservation (IBBC)
Isabel Marisa Mateus BorgesAgroforestry Ecology (AGRO-FOR-CARE)