9Reed D W, Tukey H B. Ultrastructural localization of polysaccharides in apple leaf cuticle. Journal of America Society of Horticulture Science, 1982, 107(5): 775-778.
10Schonherr J, Bukovac M J. The nature of precipitates formed in the outer cell wall following fixation of leaf tissue with gilson solution. Planta, 1970, 92: 202-207.