Combined effect of the extracts from Croton tiglium, Euphorbia lathyris or Euphorbia tirucalli and n-butyrate on Epstein-Barr virus expression in human lymphoblastoid P3HR-1 and Raji cells - Ito,M.; Kawanishi,M.; Harayama,T.; Takabayashi,S. (Cancer Letters, 1981)