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APA Citation
Billah, M. M., Mohd Yusof, Z., Kadir, K., Mohd Ali, A. M., Nasir, H., & Sunni, A. (2019). experimental investigation of a novel walking stick in avoidance drop-off for visually impaired people. Cogent engineering, 6(1), . http://access.bl.uk/ark:/81055/vdc_100099962334.0x000017