1. LaCour, D.: Drop size in intravenous infusion. Acta Anaesthesiol. Scand.24, 35 (1966)
2. Ferenchak, P., Collins Jr., J.J., Morgan, A.: Drop size and rate in parenteral infusion. Surgery70, 674 (1971)
3. Flack, F.C., Whyte, T.D.: Behavour of standard gravity-fed administration sets used for intravenous infusion. Br. Med. J.3, 439 (1974)
4. Demoruelle, J.L., Harrison, W.L., Flora, R.E.: Flow rate maintenance and output of intravenous fluid administration sets. Am. J. Hosp. Pharm.32, 177 (1975)
5. Rithalia, S.V.S., Tinker, J.: Automatic infusion devices. Br. J. Clin. Equip.3, 163 (1978)