1. Abo El-Nil & Zettler, Pl. Dis. Reptr 60: 281, 1976.
  2. Abo El-Nil, Zettler & Hiebert, Phytopathology 67: 1445, 1977.
  3. Alconero, Pl. Dis. Reptr 56: 320, 1972.
  4. Alconero & Zettler, Pl. Dis. Reptr 55: 506, 1971.
  5. Arai, Doi & Yora, Ann. Phytopath. Soc. Japan 36: 363, 1970.
  6. Buddenhagen, Milbrath & Hsieh, Proc. int. Symp. trop. Root & Tuber Crops 2: 53, 1970.
  7. Debrot & Ordosgoitti, Pl. Dis. Reptr 58: 1032, 1974.
  8. Gollifer, Jackson, Dabek, Plumb & May, PANS 23: 171, 1977.
  9. Hakkaart & Waterreus, Acta Hort. 59: 175, 1976.
  10. Hartman, Ph.D. Dissertation, Univ. Fla, 1974a.
  11. Hartman, Phytopathology 64: 237, 1974b.
  12. Hartman & Zettler, Phytopathology 62: 804, 1972.
  13. Hartman, Zettler, Knauss & Hawkins, Proc. Fla St. hort. Soc. 85: 404, 1972.
  14. Herold, Phytopathology 57: 8, 1967.
  15. Hiebert & McDonald, Virology 56: 349, 1973.
  16. James, Kenten & Woods, J. gen. Virol. 21: 145, 1973.
  17. Kenten & Woods, PANS 19: 38, 1973.
  18. Kolbasina & Protsenko, Byull. glavn. bot. Sada Leningr. 88: 98, 1973.
  19. Lovisolo & Conti, Annls Phytopath. 1: 367, 1969.
  20. Morales & Zettler, Fitopatologia Colombiana 6: 134, 1977.
  21. Tompkins & Severin, Hilgardia 20: 207, 1950.
  22. Tooyama, Ann. Phytopath. Soc. Japan 41: 504, 1975a.
  23. Tooyama, Ann. Phytopath. Soc. Japan 41: 506, 1975b.
  24. Van Hoof, Jversl. Inst. plziektenk. Onderz. Wageningen, 1971: 87, 1972.
  25. Volin & Zettler, HortScience 11: 459, 1976.
  26. Zettler, Foxe, Hartman, Edwardson & Christie, Phytopathology 60: 983, 1970.