1. Ramsdell & Stace-Smith, Acta Horticulturae 95: 37, 1979.
  2. Ramsdell & Stace-Smith, Proc. 7th Meeting Int. Counc. for Study of Viruses and Virus-like Dis. of Grapevine, Niagara Falls, Canada, 1980: 119, 1980.
  3. Ramsdell & Stace-Smith, Phytopathology 71: 468, 1981.
  4. Sehgal, Jean, Bhalla, Soong & Krause, Phytopathology 60: 1778, 1970.
  5. Uyemoto, Taschenberg & Hummer, Pl. Dis. Reptr 61: 949, 1977.