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Koolen JJ, Visser CA, David GK, Hoedemaker G, Bot H, van Wezel HB, Dunning AJ.Koolen JJ, et al. Among authors: visser ca.J Am Soc Echocardiogr. 1990 Sep-Oct;3(5):374-83. doi: 10.1016/s0894-7317(14)80137-5.J Am Soc Echocardiogr. 1990.PMID: 2245030
van Wezel HB, Visser CA, Koolen JJ.van Wezel HB, et al. Among authors: visser ca.Eur Heart J. 1989 Dec;10 Suppl H:33-7. doi: 10.1093/eurheartj/10.suppl_h.33.Eur Heart J. 1989.PMID: 2627961No abstract available.