Khan, A.; Botti, S.; Al-Subhi, A.; Altosaar, I.; Zaidi, M.; Alma, A.; Bertaccini, A. Molecular Characterization of the 16S RRNA Gene of Phytoplasmas Detected in Two Leafhopper Species Associated With Alfalfa Plants Infected With Witches’ Broom in Oman. Phytopathol. Mediterr. 2003, 42, 257-267.