1. Akiyama, Y., Kato, K.: Hydroxyproline arabinosides from suspension-cultured tobacco cell wall. Agric. Biol. Chem. 40, 2343?2348 (1976)
2. Albersheim, P., Nevins, D.J., English, P.D., Karr, A.: A method for the analysis of sugars in plant cell-wall polysaccharides by gas-liquid chromatography. Carbohyd. Res. 5, 340?345 (1967)
3. Dische, Z.: Colour reactions of carbohydrates. Methods Carbohydrate Chem. 1, 477?514 (1962)
4. Drozdz, M., Kucharz, E., Szyja, J.: A colorimetric micromethod for determination of hydroxyproline in blood serum. Z. Med. Labortech. 17, 163?171 (1976)
5. Esquerré-Tugayé, M.T., Mazau, D.: Effect of a fungal disease on extensin, the plant cell wall glycoprotein. J. exp. Bot. 25, 509?513 (1974)