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Lian O, Holen KJ, Engebretsen L, Bahr R.Lian O, et al. Among authors: engebretsen l.Scand J Med Sci Sports. 1996 Oct;6(5):291-6. doi: 10.1111/j.1600-0838.1996.tb00473.x.Scand J Med Sci Sports. 1996.PMID: 8960651
Engebretsen L, Bahr R.Engebretsen L, et al.Tidsskr Nor Laegeforen. 2001 Jan 10;121(1):18.Tidsskr Nor Laegeforen. 2001.PMID: 12013609Free article.Norwegian.No abstract available.