M. VIRŠČEK MARN, I. MAVRIČ PLEŠKO, D. ALTENBACH, and W. BITTERLIN, “Sensitivity of field tests, serological and molecular techniques for Plum Pox Virus detection in various tissues”, aas, vol. 103, no. 1, pp. 129–136, Dec. 2015, doi: 10.14720/aas.2014.103.1.13.