1. Devol G. C. U.S. Patent 2 988 237 (1961).
2. Godolphin W., in Advances in Laboratory Automation: Robotics,, Strimaitis J. R., Hawk G. L., Eds. (Zymark Corp., Hopkinton, MA, 1983), vol. 2, p. 553.
3. Sasaki M., et al., Clin. Chim. Acta278, 217 (1998).
4. Felder R. A., et al., Arch. Pathol. Lab. Med.119, 948 (1995).
5. Boyd J. C., Felder R. A., Savory J., Clin. Chem.42, 1901 (1996).