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Hirsch A, Nijveldt R, van der Vleuten PA, Biemond BJ, Doevendans PA, van Rossum AC, Tijssen JG, Zijlstra F, Piek JJ; HEBE investigators.Hirsch A, et al. Among authors: zijlstra f.Am Heart J. 2006 Sep;152(3):434-41. doi: 10.1016/j.ahj.2006.02.007.Am Heart J. 2006.PMID: 16923409
de Boer MJ, Reiber JH, Suryapranata H, van den Brand MJ, Hoorntje JC, Zijlstra F.de Boer MJ, et al. Among authors: zijlstra f.Eur Heart J. 1995 Oct;16(10):1347-55. doi: 10.1093/oxfordjournals.eurheartj.a060741.Eur Heart J. 1995.PMID: 8746902Clinical Trial.