Apion confluens Gyllenhal, 1827
| L.—Notes on the Synonymy of the Genus Apion, with Descriptions of Five new Species, &c John Walton (1844) Annals And Magazine of Natural History 13: 444-457 | |
| Bijdrage tot de kennis der apioniden E Everts (1879) Tijdschrift voor Entomologie 22: 133-185 | |
| Ricerche zoologiche della nave oceanografica 'Minerva' (C.N.R.) sulle isole circumsarde. 6. Il popolamento a coleotteri Curculionoidea (Insecta) (1989) Annali Del Museo Civico Di Storia Naturale "giacomo Doria" 87: 373-492 |