TY - RPRT TI - Sequences and structures required for recombination between virus-associated RNAs. AU - P J Cascone AU - T F Haydar AU - A E Simon PY - 1993 DO - 10.1126/science.8484119 UR - https://pubmed.ncbi.nlm.nih.gov/8484119/ ID - 8484119 ER -