9.
Schneider B., Seemuller E., Smart C.D., Kirkpatrick B.C. 1995. Phylogenetic classification of plant pathogenic mycoplasmalike organism or phytoplasma. p. 369–380. In: “Molecular and Diagnostic Procedures in Mycoplasmology” (S. Razin, J.G. Tully, eds.) Academic Press, New York, USA.