1. Howatson, Adv. Virus Res. 16: 195, 1970.
  2. Martelli, J. gen. Virol. 5: 319, 1969.
  3. Martelli & Castellano, Phytopath. medit. 9: 39, 1970.
  4. Martelli & Cirulli, Annls Phytopath. Numéro hors série: 393, 1969.
  5. Martelli & Rana, Phytopath. medit. 9: 187, 1970.
  6. Russo & Martelli, Phytopath. medit. 11: 136, 1972.
  7. Russo & Martelli, Virology 52: 39, 1973.
  8. Wolanski & Chambers, Virology 44: 582, 1971.