1. Allen & Lyons, Phytopathology 59: 1318, 1969.
  2. Bartels, Phytopath. Z. 71: 87, 1971.
  3. Brandes & Bercks, Adv. Virus Res. 11: 1, 1965.
  4. Brandes & Wetter, Virology 8: 99, 1959.
  5. Brierley & McKay, Phytopathology 28: 123, 1938.
  6. Brierley & Smith, Phytopathology 34: 718, 1944.
  7. Cayley, Gdnrs' Chron. 83: 435, 1928.
  8. Civerolo, Semancik & Weathers, Phytopathology 58: 1481, 1968.
  9. Dufrénoy, C. r. Séanc. Soc. Biol. 108: 51, 1931.
  10. Hoog, Gdnrs' Chron. 94: 471, 1933.
  11. McKay, Brierley & Dykstra, Yb. U.S. Dep. Agric. 1928: 596, 1929.
  12. McKenny-Hughes, Ann. appl. Biol. 18: 16, 1931.
  13. McKenny-Hughes, Ann. appl. Biol. 21: 112, 1934.
  14. McWhorter, Phytopathology 25: 898, 1935.
  15. McWhorter, Ann. appl. Biol. 25: 254, 1938.
  16. McWhorter, Stain Technol. 16: 143, 1941.
  17. Rozendaal & van Slogteren, Proc. 3rd Conf. Potato Virus Diseases, Lisse-Wageningen, 1957: 20, 1958.
  18. van Slogteren, Meded. Rijksfac. Landb. Wetensch. Gent 31: 986, 1966.
  19. van Slogteren & Asjes, Daffodil Tulip Yb. 35: 85, 1970.
  20. van Slogteren & de Bruyn Ouboter, Meded. LandbHoogesch. Wageningen 45(4), 54 pp., 1941.
  21. van Slogteren & de Vos, Proc. Conf. Pl. Viruses, Wageningen 1965: 320, 1966.
  22. Wetter, Arch. Mikrobiol. 37: 278, 1960.
  23. Yamaguchi, Ann. phytopath. Soc. Japan 23: 240, 1958.
  24. Yamaguchi, Ann. phytopath. Soc. Japan 26: 131, 1961.
  25. Yamaguchi, Kikumoto & Matsui, Virology 20: 143, 1963.