Nam Sinh, T. 2017. SEGRE’S UPPER BOUND FOR THE REGULARITY INDEX OF 2n+1 DOUBLE POINTS IN P^n. Hue University Journal of Science: Natural Science. 126, 1B (May 2017), 23-36. DOI:https://doi.org/10.26459/hueuni-jns.v126i1B.3910.