1. Boulos S. T. etBeakbane A. B. (1971): A chemical method for separating leaf epidermis from mesophyll tissues.—U. A. R. J. Bot., 14: 317–322.
2. Bhatia R. C. (1982): Studies of stomatal index and transpiration inTrigonella occulta Delile.—Geobios, 9: 35–36.
3. Gupta B. (1961): Correlation of tissues in leaves. II. Absolute stomatal numbers.—Ann. Bot., London, 25: 71–77.
4. Maximov N. A. (1931): The physiological significance of the xeromorphic structure of plants.—J. Ecol., London, 19: 273–282.
5. Ramayya N. etRajagopal T. (1968): Foliar epidermis as taxonomic aid in the “Flora of Hyderabad”. —J. Osmania Univ., 4: 147–160.