1. Acidic and basic properties of hydroxylated metal oxide surfaces
2. Lyklema , J.Fundamentals of Interface and Colloid Science; Academic Press : London , 1995 ; 3.2 – 3.232 .
3. Kitahara , A. Watanabe , A.Electrical Phenomena at Interfaces; Marcel Dekker Inc. : New York , 1984 ; 15 .