1. A pH-endoradiosonde;Jacobson;Lancet,1957
2. Clinical applications of telemetering techniques;Noller,1960
3. Constructional aspects of radio pills suitable for mass production;Wolff,1960
4. Echo capsule for medical use (a batteryless endoradiosonde);Nagumo,1962
5. Assessment of gastric function by pH telemetering capsule;Connell;Lancet,1964