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van Winkelhoff AJ, Abbas F, Pavicic MJ, de Graaff J.van Winkelhoff AJ, et al. Among authors: abbas f.J Clin Microbiol. 1991 Apr;29(4):723-5. doi: 10.1128/jcm.29.4.723-725.1991.J Clin Microbiol. 1991.PMID: 1890173Free PMC article.
van Steenbergen TJ, Van der Velden U, Abbas F, de Graaff J.van Steenbergen TJ, et al. Among authors: abbas f.J Periodontol. 1991 Apr;62(4):235-41. doi: 10.1902/jop.1991.62.4.235.J Periodontol. 1991.PMID: 1645404
van Winkelhoff AJ, Abbas F, Pavicic MJ, de Graaff J.van Winkelhoff AJ, et al. Among authors: abbas f.Ned Tijdschr Geneeskd. 1991 Dec 28;135(52):2489-91.Ned Tijdschr Geneeskd. 1991.PMID: 1758517Dutch.
Goené RJ, Winkel EG, Abbas F, Rodenburg JP, van Winkelhoff AJ, de Graaff J.Goené RJ, et al. Among authors: abbas f.J Periodontol. 1990 Jan;61(1):61-4. doi: 10.1902/jop.1990.61.1.61.J Periodontol. 1990.PMID: 2179514
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Van der Velden U, Van Winkelhoff AJ, Abbas F, De Graaff J.Van der Velden U, et al. Among authors: abbas f.J Clin Periodontol. 1986 Mar;13(3):243-8. doi: 10.1111/j.1600-051x.1986.tb01467.x.J Clin Periodontol. 1986.PMID: 3457811
Martijn van Steenbergen TJ, van Winkelhoff AJ, van der Mispel L, van der Velden U, Abbas F, de Graaff J.Martijn van Steenbergen TJ, et al. Among authors: abbas f.J Clin Microbiol. 1986 Oct;24(4):636-8. doi: 10.1128/jcm.24.4.636-638.1986.J Clin Microbiol. 1986.PMID: 3771753Free PMC article.
Lie MA, van der Weijden GA, Timmerman MF, Abbas F, de Graaff J, Henskens YM, van der Velden U.Lie MA, et al. Among authors: abbas f.J Clin Periodontol. 1994 Mar;21(3):171-6. doi: 10.1111/j.1600-051x.1994.tb00299.x.J Clin Periodontol. 1994.PMID: 8157769