1. AMERICAN SOCIETY FOR TESTING AND MATERIALS (1975): Special procedures for testing soil and Rock for Engineering Purposes.Special Technical Publication, p. 479. 5th ed.
2. GIDIGASU M.D. (1975): The behaviour of laterite materials in the roadway structure. (A review)Buil. Road Res. Inst. Ghana, Current Rep. 8: p. 37.
3. GIDIGASU, M.D. (1980): Geotechnical evaluation of residual gravels in pavement construction.Eng. Geol. 15: p. 173–194.
4. GIDIGASU, M.D. (1983): Development of acceptance specifications for tropical gravel paving materials.Eng. Geol. 19: 213–240 pp.
5. REMILLON, A. (1955): Stabilization of lateritesProc. Highway Res. Board, Bull. 108, p. 96–101.