Detection of potato spindle tuber viroid (PSTVd) in minute amounts of potato (Solanum tuberosum L.) leaf tissue by hybridization techniques and, together with potato viruses, by multiplex RT-PCR Khan, M.S. Timmermann, C. Hoque, M.I. Sarker, R.H. Mühlbach, Hans-Peter 2009 - Forschungsinformationssystem der UHH