Template:Keppel et al., 2012
- Keppel, E.; Sigovini, M.; Tagliapietra, D. 2012: A new geographical record of Polycera hedgpethi Er. Marcus, 1964 (Nudibranchia: Polyceridae) and evidence of its established presence in the Mediterranean Sea, with a review of its geographical distribution. Marine biology research 8(10): 969–981. DOI: 10.1080/17451000.2012.706306