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Yusof, M.F.M. et al. 2018. Axial Calibration of QPD Signal based on Stuck Bead Method for Optical Trapping Applications.
International Journal of Engineering and Technology. 7, 4.30 (Nov. 2018), 371–373
. DOI:https://doi.org/10.14419/ijet.v7i4.30.22320.