1. Anderson. D. R., 1969. Ultrastructural studies of mycoplasmas and the L-phase of bacteria. In: L. Hayflick (Ed.). The mycoplasmatales and the L-phase of bacteria, p. 365–402. Amsterdam.
2. Borges, M. de Lourdes V. & David-Ferreira, J. F., 1968. Presence of mycoplasma inLycopersicon esculentum Mill. with ‘Mal Azul’-Bolm Soc. broteriana 42 (2a S): 321–328.
3. Borges, M. de Lourdes V. & David-Ferreira, J. F., 1970. Observations on the phloem of tomato plants infected withMycoplasma sp.C. r. Congr. int. Micr. electron. (Grenoble) 1: 351–352.
4. Borges, M. de Lourdes V. & Martins, Manuela M., 1971. A virescencia do tabaco. Presença de micoplasmas e ensaios com tetraciclinas.Agronomia lusit. 33 (in press).
5. Borrel, A., Dujardin-Beaumetz, J., Jeantet & Jouan, J., 1910. Le microbe de la péripmeumonie,Annls Inst. Pasteur, Paris 24: 161–167.