1. Ruben H (1950) Nord Anaestesiol Forening 1. Kongress Oslo, August 1950
2. Ruben H (1953) Multipurpose anesthesia valve (in Danish). Nord Med 50: 1242–1243
3. Ruben H (1954) New anesthetic valve with possibilities for extensive application (in Danish). Ugeskr Laeger 116: 297–300
4. Ruben H (1957) (A new apparatus for artificial respiration), (in Danish). Ugeskr Laeger 119: 14–16
5. Mushin WW, Rendell-Baker L (1953) The principles of thoracic anaesthesia. Blackwell, Oxford, p 149