Y. Z. DINKHA, J. H. HAIDO, and M. H. ALI, “FLEXURAL BEHAVIOR OF REINFORCED CONCRETE BEAMS MADE WITH ORDINARY AND HIGH STRENGTH CONCRETES: EFFECT OF INTERFACIAL ROUGHNESS BETWEEN OLD AND NEW CONCRETES”, JDU, vol. 20, no. 1, pp. 570-579, Jul. 2017.