Systemic spread of sequence-specific transgene RNA degradation in plants is initiated by localized introduction of ectopic promoterless DNA
Cell (1998) - Comments
pubmed: 9790525  issn: 0092-8674  doi: 10.1016/s0092-8674(00)81749-3 

Olivier Voinnet, Philippe Vain, Susan Angell, David C Baulcombe