1. Norton RL, Wang SSL (2004) Design of machinery: an introduction to the synthesis and analysis of mechanisms and machines. McGraw-Hill Higher Education
2. Muthanna AV, Sajay Krishnan M, Nasruddin PN, Pavan Kumar M (2017) Analysis of tri-star frame in stair climbing hand truck. Int J Eng Sci Comput 7(4): 6444–6449
3. Raundal APV, Galande A, Devkar R, Jiman P, Pathare B (2018) Design and manufacturing of stair climbing trolley. Int J Adv Res Sci Eng 7(3):402–414
4. Shriwaskar AS, Choudhary SK (2003) Stair climbing mechanism. Thesis, Dr B R Ambedkar National Institute of Technology, Jalandhar
5. Lawn MJ, Ishimatsu T (2003) Modeling of a stair-climbing wheelchair mechanism with high single step capability. Trans Neural Syst Rehab Eng 11(3)