Lombardo, B.M., Viglianisi, F., Caruso, D. (2002): Genetic and morphological differentiation in some populations of Armadillidium aelleni (Crustacea, Isopoda, Oniscidea), a cavernicolous species of the Maltese archipelago. Italian Journal of Zoology, 69: 381–384.
Lomolino, M.V. (2001): Elevation gradient sof species-density: historical and prospective views. Global Ekology and Biogeography, 10: 3-13.
Longo, G., Musmeci, R., Privitera, R., Sottile, L. (1998): Ultrastructural organization of seminal receptacle and sperm storage in Porcellio laevis Latreille (Crustacea: Isopoda Oniscidea). Tissue & Cell, 30: 464-474.