Poovorawan, Y; Sanpavat, S; Pongpunlert, W; Chumdermpadetsuk, S; Sentrakul, P; Safary, A (9 June 1989), "Protective efficacy of a recombinant DNA hepatitis B vaccine in neonates of HBe antigen-positive mothers", JAMA, 261 (22): 3278–81, doi:10.1001/jama.261.22.3278, PMID2523981.
Poovorawan, Y; Sanpavat, S; Pongpunlert, W; Chumdermpadetsuk, S; Sentrakul, P; Safary, A (9 June 1989), "Protective efficacy of a recombinant DNA hepatitis B vaccine in neonates of HBe antigen-positive mothers", JAMA, 261 (22): 3278–81, doi:10.1001/jama.261.22.3278, PMID2523981.