1. S. Horpibulsuk, A. Kumpala, W. Katkan, A case study on underpinning for a distressed building on hard residual soil underneath non-uniform loose sand. Soil and foundations 48(2) 267-285.
2. Association of Specialist Underpinning Contractors: Guidelines on safe and efficient Underpinning and Mini piling operations. 3rd Edition ASUC April 2015.
3. An Empirical Ascertainment of the Causes of Building Failure and Collapses in Nigeria;Ayedun;Mediterr. J. Soc. Sci.,2012
4. Valuing the refurbishment cycle;Wong;Prop. Manag.,2000
5. Dynamic analysis of pile foundation underpinning structure;Wang;J. Shijiazhuang Railway Institute (Natural Science Edition),2009