1. Freeman TJ. The behaviour of fully-bonded rock bolts in the Kielder experimental tunnel. Tunnels and Tunnelling June 1978:37–40
2. Interaction of grouted rock bolts and hard rock masses at variable loading in a test drift of the Kiirunavaara Mine, Sweden;Björnfot,1984
3. Grouted rock bolt used in underground engineering in soft surrounding rock or in highly stressed regions;Sun,1984
4. Björnfot F, Stephansson O. Mechanics of grouted rock bolts — field testing in hard rock mining. Report BeFo 53:1/84, Swedish Rock Engineering Research Foundation 1984
5. Bond stresses in reinforced concrete columns and beams;Hawkes;Journal of the Institute of Structural Engineers,1951