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2.
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4.
Holmgren: Personal communication to and observation by author.
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SchmiegelowE.: Clinical Remarks on the Use of Surgical Diathermia for Malignant Tumors in the Anterior Air Passages. Laryngoscope, Dec., 1927, pp. 851 to 866.
6.
HolmgrenBerven: Erfahrungen über die Klinik gewisser bösartigen Geschwülste der oberen Luft und Speisewege. Nordischer Kongress für Otolaryngologie, Helsingfors, 1926.