Note: Z A. P. Ershov and D. E. Knuth (eds.): Algoritms in Modern Mathematics and Computer Science, LNCS vol. 122, Springer-Verlag, Berlin-Heidelberg-New York, 1981, pp. 390—396. Přeložili P. Mikulecký a J. Kelemen.
Note: From A. P. Ershov and D. E. Knuth (eds.): Algoritms in Modern Mathematics and Computer Science, LNCS 122, Springer-Verlag, Berlin—Heidelberg-New York, 1981, pp. 390—396, translated by P. Mikulecký a J. Kelemen.