TY  - RPRT
TI  - WALL THICKENING IN SIEVE ELEMENTS.
AU  - K Esau
AU  - V I Cheadle
PY  - 1958
DO  - 10.1073/pnas.44.6.546
UR  - https://pubmed.ncbi.nlm.nih.gov/16590237/
ID  - 16590237
ER  -