Rolli, E. and Peris-Felipo, F.J. 2022. First record of Aphaereta difficilis Nixon, 1939 from Italy with a key to the Italian species of the genus (Hymenoptera: Braconidae, Alysiinae). Fragmenta entomologica. 54, 1 (May 2022), 159–162. DOI:https://doi.org/10.13133/2284-4880/717.