1. Arden, S. B., Chang, W.-H., Barksdale, L.: Distribution of neuraminidase and N-acetylneuraminate lyase activities among corynebacteria, mycobacteria, and nocardias. J. Bact.112, 1206–1212 (1972)
2. Ezepchuk, Yu. V., Vertiev, Yu. V., Kostyukova, N. N.: Neuraminidase of Corynebacterium diphtheriae as a factor of pathogenicity with a spreading function. (Russ.) Bull. exp. Biol. Med.1973, Nr. 2, 63–65
3. Finney, D. J.: The Fisher-Yates test of significance in 2×2 contingency tables. Biometrica36, 145–156 (1948)
4. Fischer, K., Poschmann, A., Oster, H.: HÄmolyse bei schwerer Pneumonie infolge Neuraminidasewirkung. Immunfluorescenzdarstellung der Cryptantigene. Mschr. Kinderheilk.119, 2–8 (1971)
5. Kelly, R. T., Greiff, D.: Neuraminidase and neuraminidase-labile substrates in experimental influenza virus encephalitis. Biochim. biophys. Acta (Amst.)110, 548–553 (1965)