1. Effects of adsorbed cations on physical properties of tropical black earths, 1. Plastic limit, percentage stable aggregate and hydraulic conductivity;Ahmed;J. Soil Sci.,1969
2. A review of the application of submicroscopic techniques in soil micromorphology, I. Transmission electron microscope (TEM) and scanning electron microscope (SEM);Bisdom,1981
3. C.A. Black D.D. Evans J.L. White L.E. Ensminger F.E. Clark, 1965. Methods of Soil Analysis. Am. Soc. Agron., Madison, WI, Monogr., 9, 1349–1353; 1393–1396
4. The effect of various exchangeable cations upon the physical conditions of soils;Brooks;Soil Sci. Soc. Am. Proc,1956
5. The effect of different cations on the structural stability of some soils;Cecconi;Agrochimica,1963