1. Arnon DI (1949) Copper enzymes in isolated chloroplasts: polyphenoloxidase in Beta vulgaris, Plant Physiol. 24, 1–15.
2. Bravdo BA (1972) Photosynthesis, transpiration, leaf stomatal and mesophyll resistance measurements by the use of a ventilated diffusion porometer, Physiol. Plant. 27, 209–215.
3. Carbonneau A, Casteran P and Leclair Ph (1978) Es- sai de determination en biologie de la plante entie- re, de relations essentielles entre le bioclimat naturel, la physiologie de la vigne et la composition du raisin, Ann. Amelior. Plantes 23, (2), 195–221.
4. Carbonneau A (1979) Research on criteria and outlines of training systems for:the grapevine. Extension to woody perenial plants, Ann. Amélior. Plantes 29 (2), 173–1 85.
5. Chaves MM (1980) Photosynthesis and related parameters in grapevines grown under different light intensities, II Congress of FESPP, Santiago Composte- la, Book of Abstracts, pp. 268–269.