Lam, N. N. “INFLUENCE OF CALCIUM SULFATE ON DEVELOPMENT OF EARLY-AGE RHEOLOGICAL PROPERTIES IN SELF-LEVELING UNDERLAYMENTS BASED ON ETTRINGITE BINDER”. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, vol. 10, no. 5, Oct. 2016, pp. 102-9, https://stce.vjst.net/index.php/en/article/view/301.