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Abdelnoor M, Hall KV, Nitter-Hauge S, Golf S, Tretli S, Geiran O, Johansen A.Abdelnoor M, et al. Among authors: tretli s.Rev Epidemiol Sante Publique. 1988;36(2):89-98.Rev Epidemiol Sante Publique. 1988.PMID: 3045922Review.
Helseth A, Mørk SJ, Johansen A, Tretli S.Helseth A, et al. Among authors: tretli s.APMIS. 1989 Jul;97(7):646-54. doi: 10.1111/j.1699-0463.1989.tb00456.x.APMIS. 1989.PMID: 2751899
Andersen A, Glattre E, Johansen A, Langmark F, Magnus K, Thoresen SO, Tretli S.Andersen A, et al. Among authors: tretli s.Tidsskr Nor Laegeforen. 1986 Oct 10;106(28):2356-7.Tidsskr Nor Laegeforen. 1986.PMID: 3787598Norwegian.No abstract available.