Krstulovic Sifner, S. & Vrgoc, N. & Dadic, V. & Isajlovic, I. & Peharda, M. & Piccinetti, C. (2009)
Long-term changes in distribution and demographic composition of thornback ray, Raja clavata, in the northern and central Adriatic Sea.
Journal of Applied Ichthyology, 25(S1), 40–46 DOI: 10.1111/j.1439-0426.2008.01204.x