1. Bito, L. Z., Dawson, M. J.: The site and mechanism of the control of cholinergic sensitivity. J. Pharmacol. exp. Ther. 175, 673?684 (1970).
2. Brodeur, J., Dubois, K. P.: Studies on the mechanism of acquired tolerance by rats to 0, 0 diethyl S-2 (ethylthio) ethyl phosphorodithioate (Di-Syston). Arch. int. Pharmacodyn. 149, 560?570 (1964).
3. Cutting, W.: Handbook of Pharmacology. New York: Appleton-Century-Crofts 1967.
4. De Roeth, A., Dettbarn, W. D., Rosenberg, P., Wilensky, J. G., Wong, A.: Effect of phospholine iodide on blood cholinesterase levels of normal and glaucoma subjects. Amer. J. Ophthal. 59, 586?592 (1965).
5. Ellman, G. L., Courtney, K. D., Andres, V., Featherstone, R. M.: A new and rapid colorimetric determination of acetylcholinesterase activity. Biochem. Pharmacol. 7, 88?95 (1961).