พิบูลย์โรจน์ ท. “Periodontal health in 200 HIV-positive patients Riley C, London JP, Burmeister JA, J. Oral Pathol led 1992 ; 21 (3) : 124-7”. Thai Dental Public Health Journal, vol. 1, no. 1, July 1993, p. 51, https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/215081.