1. Brandes & Bercks, Adv. Virus Res. 11: 1, 1965.
  2. Corbett, Phytopathology 50: 346, 1960.
  3. Francki, Aust. J. biol. Sci. 19: 555, 1966.
  4. Jensen, Phytopathology 41: 401, 1951.
  5. Jensen & Gold, Phytopathology 45: 327, 1955.
  6. Kado & Jensen, Phytopathology 54: 974, 1964.
  7. Murakishi, Phytopathology 48: 132, 1958a.
  8. Murakishi, Phytopathology 48: 137, 1958b.
  9. Thornberry & Phillipe, Pl. Dis. Reptr 48: 936, 1964.