Nguyen, V. D., Huynh, L. H., Huynh, T. T., Ho, Q. P., Do, V. A. K., Nguyen, T. D., & Ronny, P. (2020). The preparation of a fine tip calcium ion selective electrode. CTU Journal of Innovation and Sustainable Development , 12(1), 45-49. https://doi.org/10.22144/ctu.jen.2020.006