1. Bock, Guthrie & Meredith, Ann. appl. Biol. 85: 97, 1977.
2. Dale & Gibbs, Aust. J. biol. Sci. 29: 397, 1976.
3. Dale, Gardiner & Gibbs, Newsl. Aust. Pl. Path. Soc. 4: 13, 1975.
4. Génevaux, Pinck & Duranton, Annls. Microbiol. (Inst. Pasteur) 127A: 47, 1976.
5. Harrison, Finch, Gibbs, Hollings, Shepherd, Valenta & Wetter, Virology 45: 356, 1971.
6. Koenig, Virology 72: 1, 1976.
7. Reichmann, Virology 25: 166, 1965.
8. Walters & Scott, Phytopathology 62: 125, 1972.