TY - GEN AU - van Bel,A J AU - Kempers,R TI - Symplastic isolation of the sieve element-companion cell complex in the phloem of Ricinus communis and Salix alba stems SN - 0032-0935 PY - 2013///1107 N1 - Publication Type: Journal Article UR - https://doi.org/10.1007/BF00197569 ER -