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2. Der Verschluß des Ductus arteriosus persistens ohne Thorakotomie***(2. Mitteilung)
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: Ductus closure without thoracotomy. Thoracic Surg 26: 749 1973 (In Japanese)
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: Closure of patent ductus arteriosus by Porstmann's method experiences of 18 cases treated without thoracotomy. Thoracic Surg 26: 812 1973 (In Japanese)
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: Successful closure of window-type ductus by Porstmann's method a case report. Heart 6: 1614 1974 (In Japanese)