*{{Cite| publisher = | language = de| last = Hildebrandt| first = Gunther| title = Die rhythmische Funktionsordnung von Puls und Atmung| location = Marburg| date = 1958|oclc= 720160901|volume=|pages=|others=Medical habilitation thesis June 4, 1959}} | *{{Cite| publisher = | language = de| last = Hildebrandt| first = Gunther| title = Die rhythmische Funktionsordnung von Puls und Atmung| location = Marburg| date = 1958|oclc= 720160901|volume=|pages=|others=Medical habilitation thesis June 4, 1959}} |